Greek island has drunken hordes (6)
I believe the answer is:
rhodes
'greek island' is the definition.
(I've seen this before)
'drunken hordes' is the wordplay.
'drunken' is an anagram indicator.
'hordes' with letters rearranged gives 'RHODES'.
'has' is the link.
(Other definitions for rhodes that I've seen before include "Greek port" , "British imperialist; Greek island" , "Hordes go to the Greek island" , "Horsed around on the Greek island" , "Cycled round hot Society Island" .)