Drop of claret is too bland when drunk (10)
I believe the answer is:
bloodstain
'drop of claret' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'is too bland when drunk' is the wordplay.
'when drunk' indicates anagramming the letters (a drunken or disorderly form of the letters).
'is'+'too'+'bland'='istoobland'
'istoobland' anagrammed gives 'BLOODSTAIN'.
Can you help me to learn more?
(Other definitions for bloodstain that I've seen before include "Sign of an earlier wound" , "criminal evidence" , "Discoloration" , "One is potential evidence" .)