Time to give up? (4)
I believe the answer is:
lent
'time to give up?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lent that I've seen before include "Gave for a limited period" , "Time of fasting" , "Forty days of fasting" , "Christian period of abstinence" , "Pre-Easter period" .)