Husband - creep that's often at the bottom of the garden (5)
I believe the answer is:
'often at the bottom of the garden' is the definition.
I can't judge whether this defines the answer.
'husband creep' is the wordplay.
'husband' becomes 'h'.
'creep' becomes 'edge' (I've seen this in other clues).
'that's' is the link.
(Other definitions for hedge that I've seen before include "Financial contract" , "Bushy barrier" , "Try to avoid answering questions or dealing with issues" , "Barrier of shrubs etc" , "avoid making commitments" .)