Drink one in Asia? Wrong (6,3)
I believe the answer is:
ionian sea
'drink' is the definition.
(drink can informally mean the sea)
'one in asia? wrong' is the wordplay.
'wrong' is an anagram indicator.
'one'+'in'+'asia'='oneinasia'
'oneinasia' is an anagram of 'IONIAN SEA'.
(Other definitions for ionian sea that I've seen before include "Waters west of Greece" , "Mediterranean area" , "Arm of the Mediterranean between Greece and Italy" , "Greek waters" , "Part of the Mediterranean" .)