Sculpture is one article made by a craftsman (7)
I believe the answer is:
artisan
'craftsman' is the definition.
(synonyms)
'sculpture is one article made by a' is the wordplay.
I cannot quite see how this works, but
'is' is found in the answer.
'one' could be 'an' (an apple is one apple) and 'an' is found within the answer.
'article' could be 'art' (abbreviation for article) and 'art' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for artisan that I've seen before include "Skilled worker by hand" , "man with skill" , "Skilled worker or craftsman" , "Sinatra (anag) -- skilled manual worker" , "Crafty sort" .)