As a headdress, it’s wrong for an artist (5)
I believe the answer is:
tiara
'as a headdress' is the definition.
I can't judge whether this defines the answer.
'it's wrong for an artist' is the wordplay.
'wrong' is an anagram indicator.
'for' means one lot of letters go next to another.
'an' becomes 'a'.
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'it' with letters rearranged gives 'ti'.
'ti'+'a'+'ra'='TIARA'
Can you help me to learn more?
(Other definitions for tiara that I've seen before include "pope may have been topped by one" , "Ornamental crescent-shaped headdress or Pope's diadem" , "Jewelled, ornamental headgear" , "Jewelled head band" , "Decorative headband" .)