Husband grabbing revolutionary’s weapon (7)
I believe the answer is:
machete
'weapon' is the definition.
(machete is a kind of weapon)
'husband grabbing revolutionary's' is the wordplay.
'husband' becomes 'mate' (I've seen this in other clues).
'grabbing' means one lot of letters goes inside another.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'mate' enclosing 'che' is 'MACHETE'.
(Other definitions for machete that I've seen before include "Broad heavy knife used in S America" , "Knife for hacking" , "Teach me with large jungle knife" , "Cheat me over broad heavy knife used in jungle" , "Heavy South American knife" .)