Lashes out in a quarrel (6)
I believe the answer is:
hassle
'a quarrel' is the definition.
(I've seen this before)
'lashes out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'lashes' is an anagram of 'HASSLE'.
'in' is the link.
(Other definitions for hassle that I've seen before include "Hound" , "Harass; pester" , "Les has (anag) - a great deal of trouble" , "Informally annoy or bother" , "Bug" .)