Picked up unappealing fruit (4)
I believe the answer is:
ugli
'fruit' is the definition.
(ugli is a kind of fruit)
'picked up unappealing' is the wordplay.
'picked up' shows a homophone (sound like).
'unappealing' becomes 'ugly' (unattractive).
'ugly' is a homophone of 'UGLI'.
(Other definitions for ugli that I've seen before include "Grapefruit/tangerine hybrid" , "Citrus fruit of the West Indies" , "Plain-sounding fruit" , "Mottled tangelo hybrid" , "(Repulsive-looking?) fruit" .)