Level men about town (7)
I believe the answer is:
destroy
'level' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for destroy that I've seen before include "Ruin or defeat roundly" , "Soundly defeat" , "Flatten" , "Demolish; pull down" , "put to death" .)