Region of Asia Minor, north of some Greek islands (6)
I believe the answer is:
ionian
'some greek islands' is the definition.
(I've seen this in another clue)
'region of asia minor north' is the wordplay.
'region of asia minor' becomes 'ionia' (I've seen this in another clue).
'north' becomes 'N' (abbreviation).
'ionia'+'n'='IONIAN'
'of' acts as a link.
(Other definitions for ionian that I've seen before include "from Greek Islands" , "Sea between Greece and Sicily" , "Sea between southern Italy and western Greece" , "Sea between Greece and south Italy" .)