A red America's revolutionary comradeship (11)
I believe the answer is:
camaraderie
'comradeship' is the definition.
(I know that comradeship can be written as camaraderie)
'a red america's revolutionary' is the wordplay.
'revolutionary' is an anagram indicator.
'a'+'red'+'america'='aredamerica'
'aredamerica' is an anagram of 'CAMARADERIE'.
(Other definitions for camaraderie that I've seen before include "all that backslapping?" , "Mutual trust and friendship" , "Friendly sociability" , "Comradeship" , "Esprit de corps" .)