Greek wine flavoured with resin (7)
I believe the answer is:
retsina
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">greek wine flavoured with resin</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for retsina that I've seen before include "Greek wine - nastier sort" , "Nastier (anag) - Greek wine" , "Greek resin-flavoured wine" , "Greek white wine flavoured with resin" , "Greek drink" .)