Cordial ingredient making patriarch bloom (11)
I believe the answer is:
elderflower
'cordial ingredient' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'patriarch bloom' is the wordplay.
'patriarch' becomes 'elder' (I've seen this before).
'bloom' becomes 'flower' (synonyms).
'elder'+'flower'='ELDERFLOWER'
'making' is the link.
Can you help me to learn more?
(Other definitions for elderflower that I've seen before include "winemaker, maybe" , "Blossom used in wine, cordial" , "Source of cordial and home-made wine" , "winemaker perhaps" , "Blossom used in wines and cordials" .)