Shunned revolutionary soldier not a communist (7)
I believe the answer is:
ignored
'shunned' is the definition.
(I've seen this before)
'revolutionary soldier not a communist' is the wordplay.
'revolutionary' says the letters should be written backwards.
'soldier' becomes 'gi' (government issue or general issue).
'not a communist' becomes 'nored'.
'gi' in reverse letter order is 'ig'.
'ig'+'nored'='IGNORED'
(Other definitions for ignored that I've seen before include "Paid no heed" , "Turned a blind eye to" , "Passed over" , "Snubbed" , "Paid no attention to" .)