Drunk went inside almost respectable pub to start with port (7)
I believe the answer is:
antwerp
'port' is the definition.
(I've seen this before)
'drunk went inside almost respectable pub to start' is the wordplay.
'drunk' indicates an anagram.
'inside' indicates putting letters inside.
'to start' suggests taking the first letters.
The first letters of 'almost respectable pub' is 'arp'.
'went' is an anagram of 'ntwe'.
'ntwe' placed into 'arp' is 'ANTWERP'.
'with' acts as a link.
(Other definitions for antwerp that I've seen before include "North Sea port" , "Belgian city/port" , "foreign city" , "harbour" , "9/11 [OLYMPIC VENUE]" .)