Senior and half-cut wino drinking beer and port (7)
I believe the answer is:
salerno
'port' is the definition.
(I've seen this before)
'senior and half-cut wino drinking beer' is the wordplay.
'senior' becomes 'sr' (similar in meaning).
'and' means one lot of letters go next to another.
'half cut' suggests halving the letters.
'drinking' is an insertion indicator.
'beer' becomes 'ale' (I've seen this before).
'wino' cut in half is 'no'.
'sr'+'no'='srno'
'srno' going around 'ale' is 'SALERNO'.
'and' acts as a link.
(Other definitions for salerno that I've seen before include "City of Campania" , "Italian city; Orleans (anag.)" , "South Italian port" , "in Italy!" , "Orleans (anag) - Italian port" .)