Agreeable question (3,3)
I believe the answer is:
why not
'agreeable' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'question' is the wordplay.
I cannot really see how this works, but
'question' could be 'why' (why is a question word) and 'why' is present in the answer.
The remaining letters 'not' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for why not that I've seen is " Challenge".)