Oddly, green ain't orange (9)
I believe the answer is:
tangerine
'orange' is the definition.
(I've seen this before)
'oddly green ain't' is the wordplay.
'oddly' is an anagram indicator.
'green'+'aint'='greenaint'
'greenaint' with letters rearranged gives 'TANGERINE'.
(Other definitions for tangerine that I've seen before include "orange colour" , "Green tan I change into orange" , "Moroccan" , "Variety of mandarin orange" , "Tree" .)