Permission to do something (5)

I think it could be either:

Which length description are you looking for?:

leave

'permission to do something' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for leave that I've seen before include "Permission to take a vacation" , "Permission (to take holidays?)" , "Don't touch" , "Desert" , "Break" .)

I've seen this clue in the Irish Times (Simplex).

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