Greek style in Greenland or Iceland (5)
I believe the answer is:
doric
'greek style' is the definition.
'in greenland or iceland' is the wordplay.
'in' says the answer is hidden in the clue.
'DORIC' can be found hidden inside 'greenland or iceland'.
(Other definitions for doric that I've seen before include "One of the Greek orders of architecture" , "Plainest order of Gk. architecture" , "Classical building style" , "Type of classical architecture" , "Greek architectural order" .)