Pinot Noir, as regularly found in ancient part of Asia (5)
I believe the answer is:
ionia
'ancient part of asia' is the definition.
(ancient region of Asia Minor)
'pinot noir as regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'pinot'+'noir'+'as'='pinotnoiras'
The alternate letters of 'pinotnoiras' are 'IONIA'.
'found in' is the link.
(Other definitions for ionia that I've seen before include "where Greeks settled" , "part of Asia Minor" , "Ancient region of Asia Minor" , "Ancient Greek region" , "Old territory" .)