Entertainment kills and how! (3,4)
I believe the answer is:
ice show
'entertainment' is the definition.
(ice show is a kind of entertainment)
'kills and how' is the wordplay.
'kills' becomes 'ices' (slang term).
'and' means one lot of letters go next to another.
'ices'+'how'='ICE-SHOW'
(Other definitions for ice show that I've seen before include "Skating entertainment" , "winter spectacular?" , "Skating event" , "form of entertainment" , "exhibition" .)