A special occasion for fruit (4)
I believe the answer is:
date
'for fruit' is the definition.
(date is a kind of fruit)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for date that I've seen before include "Sweet fruit with a long woody seed" , "A social appointment - check calendar" , "eg 1588" , "Romantic appointment" , "Tropical fruit" .)