Island in New York Bay (5)
I believe the answer is:
ellis
'island in new york bay' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ellis that I've seen before include "-- Bell, Bronte pen name" , "expert in sexual psychology" , "- Island, former reception point for US immigrants" , "island close to New York" , "Havelock --, English essayist" .)