Idiot husband attracted to old goddess sealing fate (6)
I believe the answer is:
clotho
'fate' is the definition.
(one of the Fates of Greek mythology)
'idiot husband attracted to old goddess sealing' is the wordplay.
I cannot really understand how this works, but
'idiot' could be 'clot' (both can mean a stupid person) and 'clot' is found in the answer.
'husband' could be 'h' (abbreviation) and 'h' is present in the answer.
'old' could be 'o' (abbreviation) and 'o' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for clotho that I've seen before include "One of the three Fates (she spins!)" , "One of the three Fates in Greek mythology" , "female controlling destiny" , "puff-adder" , "Fate who spun thread of life" .)