Make new term about painter (9)
I believe the answer is:
rembrandt
'painter' is the definition.
(Rembrandt is an example)
'make new term about' is the wordplay.
'make' becomes 'brand' (synonyms).
'new' indicates anagramming the letters.
'about' is an insertion indicator.
'term' with letters rearranged gives 'remt'.
'brand' placed inside 'remt' is 'REMBRANDT'.
(Other definitions for rembrandt that I've seen before include "Dutch seventeenth-century artist" , "17th-cent. Dutch painter" , "Influential Dutch artist" , "Dutch painter, d. 1669" , "'Night Watch' painter" .)