Mint drink supplied in Gwent location (7)
I believe the answer is:
newport
'location' is the definition.
(Newport is an example)
'mint drink' is the wordplay.
'mint' becomes 'new' (as in mint condition, brand new).
'drink' becomes 'port' (port is a kind of drink).
'new'+'port'='NEWPORT'
'supplied in gwent' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for newport that I've seen before include "harbour town" , "Major IOW town" , "City of southeast Wales" , "Welsh city on the Usk" , "City of south Wales" .)