Comrade mixes with men, as appropriate (10)
I believe the answer is:
commandeer
'appropriate' is the definition.
(I've seen this before)
'comrade mixes with men' is the wordplay.
'mixes with' is an anagram indicator.
'comrade' with its letters mixed up with 'men' makes 'COMMANDEER'.
'as' acts as a link.
(Other definitions for commandeer that I've seen before include "Take control of for military purposes" , "Seize" , "Take control of for military use" , "Take by force" , "requisition" .)