Green shade clothing brothers (4)
I believe the answer is:
moss
I believe this is a double definition.
'green shade' is the first definition.
(shade of green)
'clothing brothers' is the second definition.
(Moss Bros is a menswear shop)
(Other definitions for moss that I've seen before include "that may hug trees?" , "Shape of pointed arch" , "Matted growth on trees, etc." , "Former racing driver" , "Green-carpet plant" .)