Passage from a small island (5)
I believe the answer is:
aisle
'passage' is the definition.
(aisle is a kind of passage)
'a small island' is the wordplay.
'small island' becomes 'isle' (I've seen this before**).
'a'+'isle'='AISLE'
'from' acts as a link.
(Other definitions for aisle that I've seen before include "Division of the nave in church" , "Passageway between seating areas" , "Part of a church" , "Way between seating areas" , "channel" .)