Savouries available in Greek island, for instance (7)
I believe the answer is:
samosas
'savouries' is the definition.
(samosas are savoury snacks)
'greek island for instance' is the wordplay.
'greek island' becomes 'samos' (Samos is a Greek island).
'for instance' becomes 'as'.
'samos'+'as'='SAMOSAS'
'available in' is the link.
(Other definitions for samosas that I've seen before include "From parcels with spicy contents" , "lot of spicy food" , "Triangular fried pastries" , "snacks" .)