Scarper, arguing occasionally (3)
I believe the answer is:
run
'scarper' is the definition.
('run' can be a synonym of 'scarper')
'arguing occasionally' is the wordplay.
'occasionally' means one should take alternating letters.
The alternate letters of 'arguing' are 'RUN'.
(Other definitions for run that I've seen before include "escape" , "string of performances" , "work" , "Proceed quickly" , "Tear in a stocking - hurry" .)