Lived and died on ridge as result of assault (5)
I believe the answer is:
dwelt
'lived' is the definition.
(I've seen this before)
'died on ridge as result of assault' is the wordplay.
'died' becomes 'd'.
'on' means one lot of letters go next to another.
'ridge as result of assault' becomes 'welt'.
'd'+'welt'='DWELT'
'and' acts as a link.
(Other definitions for dwelt that I've seen before include "I dreamt I . . . in marble halls (song)" , "hung out" , "Spoke at length" , "Focused anxiously" , "Put much stress (on)" .)