United defeated, gutted when crushed by blow (6)
I believe the answer is:
wedded
'united' is the definition.
(wedding is a kind of uniting)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for wedded that I've seen before include "This bliss is for married couples" , "Closely joined" , "This bliss is of the married kind" , "with wife" , "Committed" .)