Drub (6)
'drub' is the definition.
(I know that drub is a kind of the trounce)
This is the entire clue.
(Other definitions for trounce that I've seen before include "Rout" , "Massacre" , "Beat thoroughly on recount" , "Wallop" , "Defeat heavily in recount" .)
'drub' is the definition.
(synonyms)
This is all the clue.
(Other definitions for thrash that I've seen before include "Beat; party (colloq.)" , "Beat severely or defeat thoroughly" , "Beat up, batter" , "stuff" , "Clobber" .)