Worked in revolutionary recess (5)
I believe the answer is:
niche
'recess' is the definition.
('niche' can be a synonym of 'recess')
'worked in revolutionary' is the wordplay.
'worked' indicates an anagram.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'in' anagrammed gives 'ni'.
'ni'+'che'='NICHE'
(Other definitions for niche that I've seen before include "Particularly well suited position" , "ideal position" , "Position well suited to the occupier" , "somewhere comfortable" , "Shallow recess in a wall" .)