Ronald accepts Diana as a sculptor! (5)
I believe the answer is:
rodin
'a sculptor' is the definition.
(Auguste Rodin was a French sculptor)
'ronald accepts diana' is the wordplay.
'ronald' becomes 'ron' (I've seen this in other clues).
'accepts' is an insertion indicator.
'diana' becomes 'Di' (Di is short for Diana).
'ron' placed around 'di' is 'RODIN'.
'as' acts as a link.
(Other definitions for rodin that I've seen before include "Sculptor of The Thinker and The Kiss" , "Sculptor (for the thinking man!)" , "He sculpted" , "Great French sculptor of 'The Thinker' etc" , "French manual worker" .)