Revolutionary soldiers holding back party (7)
I believe the answer is:
shindig
'party' is the definition.
(shindig is a kind of party)
'revolutionary soldiers holding back' is the wordplay.
'revolutionary soldiers' becomes 'sig' (I am not sure about this - if you are sure you should believe this answer much more).
'holding' is an insertion indicator.
'back' becomes 'hind' (synonyms).
'sig' going around 'hind' is 'SHINDIG'.
Can you help me to learn more?
(Other definitions for shindig that I've seen before include "Rumpus" , "Hidings (anag) - party" , "Noisy disturbance" , "Bash" , "Noisy knees-up" .)