Knockout (4)
'knockout' is the definition.
(synonyms)
This is all the clue.
(Other definitions for lulu that I've seen before include "Outstanding person; singer" , "Berg's unfinished opera" , "Glaswegian 60s pop singer" , "wonderful thing" , "Attractive girl" .)
'knockout' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for kayo that I've seen before include "Fight's ending" , "floor" , "Stun" , "Decisive end to a fight?" , "KO (sl.)" .)