Get going and defeat Italian (4,2)
I believe the answer is:
beat it
'get going' is the definition.
'defeat italian' is the wordplay.
'defeat' becomes 'beat' (beating is a kind of defeating).
'italian' becomes 'it'.
'beat'+'it'='BEAT IT'
'and' is the link.
(Other definitions for beat it that I've seen before include "Scarper" , "try out drum kit?" , "make off furtively" , "Get going" , "leave" .)