Fight expected with Liberal (4)
I believe the answer is:
duel
'fight' is the definition.
(duel is a kind of fight)
'expected with liberal' is the wordplay.
'expected' becomes 'due' (I've seen this before).
'with' says to put letters next to each other.
'liberal' becomes 'l' (abbreviation).
'due'+'l'='DUEL'
(Other definitions for duel that I've seen before include "Prearranged fight with deadly weapons between two people" , "Fight over a point of honour" , "Combat between two people in matter of honour" , "One got satisfaction from this" , "Affair of honour (between two men)" .)