Saw a time for publicity? (5)
I believe the answer is:
adage
'saw' is the definition.
('adage' can be a synonym of 'saw')
'a time for publicity?' is the wordplay.
'a time' becomes 'age' (age is a kind of time**).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'publicity?' becomes 'ad' (advert).
'age' after 'ad' is 'ADAGE'.
(Other definitions for adage that I've seen before include "True proverb or saying" , "Proverb expressing a general truth" , "Wise old saying" , "Saying, saw" , "Saw, proverb" .)