Tribal adviser and fine subordinate blossom (11)
I believe the answer is:
elderflower
'blossom' is the definition.
(I've seen this before)
'tribal adviser and fine subordinate' is the wordplay.
'tribal adviser' becomes 'elder' (I can't justify this - if you can you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'fine' becomes 'f' (abbreviation).
'subordinate' becomes 'lower' (synonyms).
'elder'+'f'+'lower'='ELDERFLOWER'
Can you help me to learn more?
(Other definitions for elderflower that I've seen before include "Blossom used in wine, cordial" , "Blossom used in wines and cordials" , "winemaker perhaps" , "Source of cordial and home-made wine" , "winemaker, maybe" .)