Creator of a hole in wrought iron (8)
I believe the answer is:
inventor
'creator' is the definition.
(inventor is a kind of creator)
'a hole in wrought iron' is the wordplay.
'a hole' becomes 'vent' (vent is a kind of hole).
'in' means one lot of letters goes inside another.
'wrought' is an anagram indicator (I've seen this in other clues).
'iron' anagrammed gives 'inor'.
'vent' placed within 'inor' is 'INVENTOR'.
'of' is the link.
(Other definitions for inventor that I've seen before include "Author" , "Designer" , "Discoverer" , "He discovers" , "Creator of something new" .)