The answer is REST, four letters. Plain wording lands here, and this is the shortest of the published options. OTHERS covers six squares, and BALANCE, RESIDUE and VESTIGE all take seven, which makes the long slot the one worth thinking about rather than the short one.
Rest is two different words wearing one spelling
The rest you take and the rest that is left over are not the same word and never have been. The sleep sense comes down from Old English. The leftover sense arrived from French, out of the Latin restare, meaning to remain or to stay behind, which is also the piece sitting inside arrest. Two separate histories collided on four letters and English simply let them share.
Setters use that collision constantly. A clue reading remainder is asking for one sense, but the surface of the clue will often be built out of the other, so a sentence about taking a break that turns out to mean the leftover portion is deliberate misdirection rather than sloppiness. When an easy clue feels oddly worded, the second meaning is usually the reason.
Seven letters is where this clue gets interesting
Run the list against your square count before you commit to anything:
| Letters | Answer | What triggers it |
|---|---|---|
| 4 | REST | The plain default |
| 6 | OTHERS | People or items, not an amount |
| 7 | BALANCE | Accounts, ledgers, a statement |
| 7 | RESIDUE | What survives a process |
| 7 | VESTIGE | A trace of something gone |
Three answers at seven squares sounds nasty until you notice they share almost nothing. First letters run B, R and V, and the crossings usually hand you one of those early. REMAINS and SURPLUS are the near misses to keep in the back of your mind at the same length, since both mean roughly what is left and both have filled seven square slots under related wordings.
Balance is the accounting sense
In ordinary speech balance means equilibrium, but in bookkeeping it means the amount remaining once everything has been added and subtracted, and that is the sense this clue wants. It is why you carry a balance on a credit card and hold a balance in a savings account. The number is a remainder, not a state of being steady.
The two senses do share an origin in the idea of weighing, since a balance was a pair of scales long before it was a figure on a statement, and the accounting sense grew out of two columns weighed against each other. A clue that mentions books, accounts or what is owed is pointing here. One that mentions poise or a gymnast is not.
Residue and vestige are two different leftovers
RESIDUE is physical and it is what a process leaves behind. Boil a pot dry and the residue is the crust on the bottom. The word also has a legal sense, the part of an estate remaining after specific gifts and debts are accounted for, which is why it appears in wills and probate paperwork.
VESTIGE is a trace. It is what remains of something otherwise gone, and it carries a sense of time having passed, as in not a vestige of doubt. Biology borrowed it for vestigial structures, features an organism still carries after the original function has disappeared. A clue wanting VESTIGE will hint at something faded or lost rather than at arithmetic or accounting.
OTHERS is the one people miss
OTHERS answers this clue when the remainder is a group rather than a quantity. The rest of the class, the rest of the guests, the rest of the crew: in each case what is left over is people, and OTHERS slides into the slot where REST would sit if the grid allowed it.
Keep it on the list, because six squares is an awkward length for this clue and nothing else obvious fills them. If the count says six and the wording sounds like it is talking about a set of individuals rather than an amount of something, write OTHERS in and expect the crossings to back you up.
