Chain part (4)
'chain part' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for isle that I've seen before include "Small area of land in water" , "Man conceivably" , "Small bit of land surrounded by water" , "Christmas or Easter, perhaps" , "Man, maybe" .)
'chain part' is the definition.
('link' is part of 'chain')
This is the entire clue.
(Other definitions for link that I've seen before include "Means of connection between things" , "Item of mail" , "Bond" , "Relationship; intertwine" , "Connexion" .)