"Me? In real trouble?" (D. Green) (7)
I believe the answer is:
emerald
'green' is the definition.
(I've seen this before)
'me? in real trouble? d' is the wordplay.
'in' means one lot of letters goes inside another.
'trouble?' indicates an anagram (I've seen 'of trouble' mean this (I've seen this in other clues)).
'real' anagrammed gives 'eral'.
'me' going into 'eral' is 'emeral'.
'emeral'+'d'='EMERALD'
(Other definitions for emerald that I've seen before include "a type employed by the press" , "Ireland is often called The .......Isle" , "Small size of type, in printing" , "Shade of green" , "Green like this isle" .)