Point to liver, come up and criticise (6)
I believe the answer is:
revile
'criticise' is the definition.
(I know that revile is a more specific form of abuse)
'point to liver come up' is the wordplay.
'point' becomes 'E' (compass point).
'come up' says the letters should be written backwards.
'e'+'liver'='eliver'
'eliver' written backwards gives 'REVILE'.
'and' acts as a link.
(Other definitions for revile that I've seen before include "Abuse verbally" , "Abusively criticise" , "Run down" , "Criticise - abuse" , "Vilify" .)