Laid-back party hosted by gauche new rebel (3,7)
I believe the answer is:
che guevara
'rebel' is the definition.
(I know that Che Guevara has the occupation resistance fighter)
'laid-back party hosted by gauche new' is the wordplay.
'laid back' shows that the letters should be reversed in order.
'party' becomes 'rave' (type of dance party).
'hosted by' means one lot of letters goes inside another.
'new' is an anagram indicator.
'rave' back-to-front is 'evar'.
'gauche' anagrammed gives 'chegua'.
'evar' placed inside 'chegua' is 'CHE GUEVARA'.
(Other definitions for che guevara that I've seen before include "Famous revolutionary" , "Argentinian-born revolutionary" , "Revolutionary who died in Bolivia" , "foreign minister?" , "Latin American revolutionary leader" .)