Eg, rioja (4)
I believe the answer is:
wine
'eg rioja' is the definition.
(I know that Rioja is a type of red wine)
This is all the clue.
(Other definitions for wine that I've seen before include "Frascati, perhaps" , "Chianti or Chardonnay?" , "Accompaniment for women and song?" , "See 18" , "Drink made from grapes" .)