Fight expected before end of bell (4)
I believe the answer is:
duel
'fight' is the definition.
(duel is a kind of fight)
'expected before end of bell' is the wordplay.
'expected' becomes 'due' (I've seen this before).
'before' means one lot of letters go next to another.
'end of' says to take the final letters.
The final letter of 'bell' is 'l'.
'due'+'l'='DUEL'
(Other definitions for duel that I've seen before include "Affair of honour (between two men)" , "honourable affair" , "Prearranged engagement" , "Combat between two people in matter of honour" , "Gentlemen's disagreement" .)