Giving bad tips causes resentment (7)
I believe the answer is:
offends
'causes resentment' is the definition.
(I've seen this before)
'giving bad tips' is the wordplay.
'giving' says to put letters next to each other.
'bad' becomes 'off' (eg meat that's gone off is bad).
'tips' becomes 'ends' (tip can mean an end or edge).
'off'+'ends' is 'OFFENDS'.
(Other definitions for offends that I've seen before include "Insults or causes displeasure to" , "annoys" , "Causes resentment" , "Breaks the law" , "Hurts the feelings" .)