Drink up on one's own, welcoming men round (7)

I believe the answer is:

oloroso

I'm a little stuck... Click here to teach me more about this clue!

'drink' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for oloroso that I've seen before include "Dark type of sherry" , "Medium-sweet sherry" , "Albert -, missionary, musician, philosopher" , "Medium sherry" , "Drink" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app