Dance with seal round a garden? (8)
I believe the answer is:
cakewalk
'dance' is the definition.
(cakewalk is a kind of dance)
'seal round a garden?' is the wordplay.
'seal' becomes 'calk' (calking is a kind of sealing**).
'round' is an insertion indicator.
'garden?' becomes 'kew' (Kew Gardens in London).
'a'+'kew'='akew'
'calk' placed around 'akew' is 'CAKEWALK'.
'with' is the link.
(Other definitions for cakewalk that I've seen before include "Proverbially easy dance" , "A picnic" , "Easy accomplishment" , "Very easy task - old dance" , "Easily accomplished task" .)