A new tropic fruit (7)
I believe the answer is:
apricot
'fruit' is the definition.
(type of fruit)
'a new tropic' is the wordplay.
'new' indicates anagramming the letters.
'tropic' with letters rearranged gives 'pricot'.
'a'+'pricot'='APRICOT'
(Other definitions for apricot that I've seen before include "Orange fruit" , "Stoned fruit" , "A fruit-tree" , "Juicy stone-fruit, orange-pink when ripe" , "tree" .)