Nice wife of master - the eldest relative from Foundation (6)
I believe the answer is:
madame
'relative from foundation' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'nice wife of master the eldest' is the wordplay.
I cannot quite see how this works, but
'master' could be 'ma' and 'ma' is found in the answer.
The remaining letters 'dame' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for madame that I've seen before include "Title for a Frenchwoman" , "Married woman abroad" , "A French-speaking woman" , "Flaubert novel" , "Proprietress of a brothel" .)