Fruit sounds topical (7)
I believe the answer is:
currant
'fruit' is the definition.
(currant is a kind of fruit)
'sounds topical' is the wordplay.
'sounds' shows a homophone (sound like).
'topical' becomes 'current' ('current' can be similar in meaning to 'topical').
'current' is a homophone of 'CURRANT'.
(Other definitions for currant that I've seen before include "Small dried fruit" , "Something ideal for jamming" , "The berry sounds electric" , "Edible berry, red or black" , "Product of grape" .)