General offensive undone by men retreating (5)
I believe the answer is:
broad
'general' is the definition.
(similar in meaning)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for broad that I've seen before include "Open" , "East Anglian waterway" , "Spacious - tolerant" , "Offspring" , "dame" .)