Look — a penny on fruit (6)
I believe the answer is:
appear
'look' is the definition.
(synonyms)
'a penny on fruit' is the wordplay.
'penny' becomes 'p' (short for pence).
'on' says to put letters next to each other.
'fruit' becomes 'pear' (pear is a kind of fruit).
'a'+'p'+'pear'='APPEAR'
(Other definitions for appear that I've seen before include "Show up, become visible" , "Materialise like ghost" , "hove in sight" , "Develop" , "Seem, look" .)