Group of trees manage to conceal skinhead? (5)
I believe the answer is:
copse
'group of trees' is the definition.
(I've seen this before)
'manage to conceal skinhead?' is the wordplay.
'manage' becomes 'cope' (synonyms).
'to conceal' indicates putting letters inside.
'skinhead?' becomes 's' (head letter of 'skin').
'cope' going around 's' is 'COPSE'.
(Other definitions for copse that I've seen before include "Scope for a small wood" , "Wood - thicket" , "Cultivated woodland area" , "Harvested woodland" , "Piece of woodland used for cutting" .)