Provided drink all round when the day was victorious (5)
I believe the answer is:
given
'provided' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for given that I've seen before include "Donated" , "Specified - granted" , "Awarded" , "Specified, stated" , "assumed fact" .)