Assess age of fruit (4)
I believe the answer is:
date
'fruit' is the definition.
(date is a kind of fruit)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for date that I've seen before include "Romantic meeting" , "Girlfriend perhaps" , "may be fruitful" , "Fruit with stone" , "Year or day when an event occurred" .)