Promises (6)

I think it could be either:

Which length description are you looking for?:

swears

'promises' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for swears that I've seen before include "Takes oath or curses" , "Quite (mus.); a female voice" , "Blinds" , "Curses or pledges" , "Takes oath or utters imprecation (6)" .)

I've seen this clue in The Times and The Sunday Times.

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