Odd male with red and green gem (7)
I believe the answer is:
emerald
'green gem' is the definition.
(I've seen this before)
'odd male with red' is the wordplay.
'odd' is an anagram indicator.
'with' is a charade indicator (letters next to each other).
'male' after 'red' is 'redmale'.
'redmale' anagrammed gives 'EMERALD'.
'and' is the link.
(Other definitions for emerald that I've seen before include "On of the Greens" , "Shade of green" , "Green - jewel" , "Bright green colour" , "Green gemstone" .)