Fellow in luck getting attic (4)
I believe the answer is:
loft
'attic' is the definition.
('loft' can be a synonym of 'attic')
'fellow in luck' is the wordplay.
'fellow' becomes 'f' (abbreviation - of a society etc.).
'in' means one lot of letters goes inside another.
'luck' becomes 'lot' ('lot' can be a synonym of 'luck').
'f' put into 'lot' is 'LOFT'.
'getting' acts as a link.
(Other definitions for loft that I've seen before include "Attic" , "Roof space area" , "Backward slope in face of golf club" , "Sky" , "Space inside a roof" .)