Ruin or defeat roundly (7)
I believe the answer is:
destroy
(Other definitions for destroy that I've seen before include "'Demolish, ruin (7)'" , "put to death" , "Wreck" , "Ruin; pull down" , "Kill; ruin" .)
I believe the answer is:
destroy
(Other definitions for destroy that I've seen before include "'Demolish, ruin (7)'" , "put to death" , "Wreck" , "Ruin; pull down" , "Kill; ruin" .)