Oddly, isn't a green fruit (10)
I believe the answer is:
tangerines
'fruit' is the definition.
(I've seen this before)
'oddly isn't a green' is the wordplay.
'oddly' indicates an anagram.
'isnt'+'a'+'green'='isntagreen'
'isntagreen' is an anagram of 'TANGERINES'.
(Other definitions for tangerines that I've seen before include "Natives of Tangiers" , "fruit" , "Citrus fruits" .)