Stoneworker’s parent and offspring (5)
I believe the answer is:
mason
'stoneworker's' is the definition.
(I've seen this before)
'parent and offspring' is the wordplay.
'parent' becomes 'ma' (ma is a kind of parent).
'and' says to put letters next to each other.
'offspring' becomes 'son' (son is a kind of offspring).
'ma'+'son'='MASON'
(Other definitions for mason that I've seen before include "one wearing an apron" , "secretive lodger!" , "One is skilful with stone" , "Craftsman - English film actor, d. 1984" , "One going to work in building" .)