Fruit provided by chap on leave (5)
I believe the answer is:
mango
'fruit' is the definition.
(type of fruit)
'chap on leave' is the wordplay.
'chap' becomes 'man' (chap can mean a man).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'leave' becomes 'go' (to go is to depart or leave).
'man'+'go'='MANGO'
'provided by' acts as a link.
(Other definitions for mango that I've seen before include "Large oval tropical fruit" , "Ovoid edible fruit" , "fruit-tree" , "Type of fruit" , "Yellow-fleshed fruit" .)