Wild idea to agree with artist (7)
I believe the answer is:
chimera
'wild idea' is the definition.
(I've seen this before)
'agree with artist' is the wordplay.
'agree' becomes 'chime'.
'with' is a charade indicator (letters next to each other).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'chime'+'ra'='CHIMERA'
'to' is the link.
(Other definitions for chimera that I've seen before include "Imaginary monster" , "Fire-breathing female monster" , "Fantastic creation of the mind, like Greek mythical monster" , "Wild notion" , "Each rim (anag) - foolish fancy" .)