At the home of revolutionary leader in Zaire (4)
I believe the answer is:
chez
'at the home' is the definition.
(I've seen this before)
'revolutionary leader in zaire' is the wordplay.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'leader in' says to take the initial letters.
The first letter of 'zaire' is 'z'.
'che'+'z'='CHEZ'
'of' is the link.
(Other definitions for chez that I've seen before include "At the French home of - moi?" , "A French house, may be moi" , "At French house, maybe moi" , "At the home of - in France" .)