Revolutionary star playing with men in big band (9)
I believe the answer is:
orchestra
'big band' is the definition.
'revolutionary star playing with men' is the wordplay.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary**).
'playing' indicates an anagram.
'with' means one lot of letters go next to another.
'men' becomes 'or' (I've seen this in other clues).
'star' with letters rearranged gives 'stra'.
'che'+'stra'='chestra'
'chestra' put after 'or' is 'ORCHESTRA'.
'in' acts as a link.
(Other definitions for orchestra that I've seen before include "Group of musicians found on cart-horse" , "Musical ensemble" , "alternative to the organ" , "Gamelan, for instance" , "Big group of musicians playing various instruments" .)