Fragile revolutionary trap backfiring (6)
I believe the answer is:
tender
'fragile' is the definition.
(I've seen this before)
'revolutionary trap backfiring' is the wordplay.
'revolutionary' becomes 'red' (red can informally mean communist).
'trap' becomes 'net' (net is a kind of trap).
'backfiring' says the letters should be written in reverse.
'red'+'net'='rednet'
'rednet' reversed gives 'TENDER'.
(Other definitions for tender that I've seen before include "Former railway vehicle is sensitive" , "Ship's boat" , "facility for steam train" , "Offer for acceptance" , "Make bid as for contract" .)