Prevail over the wrong party (5)
I believe the answer is:
outdo
'prevail' is the definition.
The answer and definition can be both related to competing as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?
'over the wrong party' is the wordplay.
'over' says to put letters next to each other.
'the wrong' becomes 'out' (eg a calculation might be 'out').
'party' becomes 'do' (do can informally mean a party).
'out'+'do' is 'OUTDO'.
Can you help me to learn more?
(Other definitions for outdo that I've seen before include "Get the better of" , "Surpass someone at something" , "Cap" , "going to top?" , "Overcome" .)