Pinot Noir seen regularly near a region of Greece (5)
I believe the answer is:
ionia
'region of greece' is the definition.
(Ionia was part of ancient Greece)
'pinot noir seen regularly near a' is the wordplay.
'seen regularly' means one should take alternating letters.
'near' means one lot of letters go next to another.
'pinot'+'noir'='pinotnoir'
The alternating letters of 'pinotnoir' are 'ioni'.
'ioni'+'a'='IONIA'
(Other definitions for ionia that I've seen before include "Aegean region which gives its name to the adjacent sea" , "Ancient area" , "Old region in Asia Minor" , "where Greeks settled" , "East coast of the Aegean in Classical times" .)