Drink initially in song about wine (5)
I believe the answer is:
rioja
This clue could be a double definition.
'drink initially in song' is the first definition.
'rioja' can be an answer for 'drink' (I've seen this before). I'm not sure about the 'initially in song' bit.
'wine' is the second definition.
(Rioja is an example)
'about' acts as a link.
Can you help me to learn more?
(Other definitions for rioja that I've seen before include "Spanish table wine" , "North Spanish wine" , "Spanish wine type" , "Open space (ancient Greek)" , "it comes from grapevine" .)