In the Mao revolution (2,4)
I believe the answer is:
at home
'in' is the definition.
(someone at home is 'in')
'the mao revolution' is the wordplay.
'revolution' indicates an anagram.
'the'+'mao'='themao'
'themao' is an anagram of 'AT-HOME'.
(Other definitions for at home that I've seen before include "Oh mate! (anag)" , "In (for a party?)" , "Where one lives" , "In one's own house" , "Comfortable - in one's own country" .)