Fruit or vegetable taken by rook? (4)
I believe the answer is:
pear
'fruit' is the definition.
(pear is a kind of fruit)
'vegetable taken by rook?' is the wordplay.
'vegetable' becomes 'pea' (pea is a kind of vegetable).
'taken by' is a charade indicator (letters next to each other).
'rook?' becomes 'r' (abbreviation in chess).
'pea'+'r'='PEAR'
'or' is the link.
(Other definitions for pear that I've seen before include "Orchard fruit" , "Avocado" , "One fruit sounds like two" , "Fruit tree" , "Pomaceous fruit" .)