It's to do with wrought-iron artist (6)
I believe the answer is:
renoir
'artist' is the definition.
(French artist Pierre-Auguste Renoir)
'it's to do with wrought-iron' is the wordplay.
'it's to do with' becomes 're' (regarding).
'wrought' indicates an anagram (wrought means beaten into a new shape).
'iron' is an anagram of 'noir'.
're'+'noir'='RENOIR'
(Other definitions for renoir that I've seen before include "French Impressionist painter, 1841-1919" , "French Impressionist, or his film director son" , "Fr. impressionist ('La Loge')" , "Jean -, Fr. film director, son of painter" , "No, I err about the great painter" .)