Drunken sea dog in coastal location (3,5)
I believe the answer is:
san diego
'coastal location' is the definition.
(city on Californian coast)
'drunken sea dog in' is the wordplay.
'drunken' indicates an anagram.
'sea'+'dog'+'in'='seadogin'
'seadogin' is an anagram of 'SAN DIEGO'.
(Other definitions for san diego that I've seen before include "City of S. California" , "Californian resort" , "Pacific port" , "Southern California naval base" , "Californian port" .)