End with bit of fish and beer (6)
I believe the answer is:
finale
'end' is the definition.
(finale is the end of a show)
'bit of fish and beer' is the wordplay.
'bit of fish' becomes 'fin' ('fin' is part of 'fish').
'and' says to put letters next to each other.
'beer' becomes 'ale' (type of beer).
'fin'+'ale'='FINALE'
'with' acts as a link.
(Other definitions for finale that I've seen before include "Last section of a musical composition" , "Last act, movement" , "Last item of event" , "When it's grand, it's the last scene" , "Conclusion, end" .)