Stay-at-home dad has unused hob worked out? (5,7)
I believe the answer is:
house husband
'stay-at-home dad' is the definition.
(term for a father who doesn't work)
'has unused hob worked out?' is the wordplay.
'worked out?' is an anagram indicator (I've seen 'worked out' mean this).
'has'+'unused'+'hob'='hasunusedhob'
'hasunusedhob' anagrammed gives 'HOUSE-HUSBAND'.
(Other definitions for house husband that I've seen before include "Male partner responsible for domestic duties" , "Male with an iron and a feather duster?" .)