Type of whisky associated with a Mediterranean island (5)
I believe the answer is:
malta
'mediterranean island' is the definition.
(Malta is an island in the Mediterranean)
'type of whisky associated with a' is the wordplay.
'type of whisky' becomes 'malt'.
'associated with' is a charade indicator (letters next to each other).
'malt'+'a'='MALTA'
(Other definitions for malta that I've seen before include "Mediterranean island, capital Valletta" , "Mediterranean country" , "GC island" , "defiant island in WW2" , "Island member of the European Union" .)