Wild fellow managed revolutionary sex clubs (7)
I believe the answer is:
frantic
'wild' is the definition.
(similar in meaning)
'fellow managed revolutionary sex clubs' is the wordplay.
'fellow' becomes 'F' (abbreviation - of a society etc.).
'managed' becomes 'ran' (both can mean organised or was in charge of).
'revolutionary' says the letters should be written backwards (letters revolve around).
'sex' becomes 'it' (common euphemism).
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
'it' reversed gives 'ti'.
'f'+'ran'+'ti'+'c'='FRANTIC'
(Other definitions for frantic that I've seen before include "Deranged by fear, worry etc" , "Overwrought" , "At the end of one's tether" , "Mad" , "Beside oneself" .)