Snarl from Left after good argument (5)
I believe the answer is:
growl
'snarl' is the definition.
(I've seen this before)
'left after good argument' is the wordplay.
'left' becomes 'L' (common abbreviation).
'after' says to put letters next to each other.
'good' becomes 'g' (abbreviation).
'argument' becomes 'row' (to row is to argue).
'g'+'row'='grow'
'l' after 'grow' is 'GROWL'.
'from' is the link.
(Other definitions for growl that I've seen before include "Hostile animal's sound" , "Show aggression as boxer" , "Hostile dog's noise" , "snap" , "bare teeth" .)