Senior member to bloom as a supplier of wine (11)
I believe the answer is:
elderflower
'a supplier of wine' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'senior member to bloom' is the wordplay.
'senior member' becomes 'elder'.
'to bloom' becomes 'flower' ('flower' can be a synonym of 'bloom').
'elder'+'flower'='ELDERFLOWER'
'as' is the link.
Can you help me to learn more?
(Other definitions for elderflower that I've seen before include "Source of cordial and home-made wine" , "winemaker perhaps" , "Blossom used in wines and cordials" , "winemaker, maybe" , "Blossom used in wine, cordial" .)