Sponsor of moulded garden pot (9)
I believe the answer is:
godparent
'sponsor' is the definition.
(godparent is a kind of sponsor)
'moulded garden pot' is the wordplay.
'moulded' indicates anagramming the letters.
'garden'+'pot'='gardenpot'
'gardenpot' with letters rearranged gives 'GODPARENT'.
'of' is the link.
(Other definitions for godparent that I've seen before include "Pet dragon (anag)" , "Religious guardian" , "Baptism sponsor" , "as one responsible for charge" .)