A sticky appointment? (4)
I believe the answer is:
date
'appointment?' is the definition.
(I know that appointment can be written as date)
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 "A social appointment - check calendar" , "Stoned fruit" , "Sticky fruit" , "Romantic meeting" , "Particular time of event - fruit" .)