Goddess seen in Ellis Island (4)
I believe the answer is:
isis
'goddess' is the definition.
(Egyptian god)
'in ellis island' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ISIS' is hidden in the letters of 'ellis island'.
'seen' acts as a link.
(Other definitions for isis that I've seen before include "Exists twice for a goddess" , "The upper Thames" , "Repetitive Egyptian goddess" , "To be, to be an Egyptian goodess" , "Goddess of the rainbow" .)