Concluded a good wine includes hint of earthiness (6)
I believe the answer is:
agreed
'concluded' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I don't see?
'a good wine includes hint of earthiness' is the wordplay.
'a good' becomes 'ag' (I've seen this in other clues).
'wine' becomes 'red' (red wine is an example).
'includes' means one lot of letters goes inside another.
'hint of' indicates taking the first letters.
The first letter of 'earthiness' is 'e'.
'red' enclosing 'e' is 'reed'.
'ag'+'reed'='AGREED'
Can you help me to learn more?
(Other definitions for agreed that I've seen before include "Harmonised" , "matched" , "Assented, acquiesced" , "That's right" , "Acceded" .)