Corpulent friar's bound for confectionery store (4,4)
I believe the answer is:
tuck shop
'confectionery store' is the definition.
(I know that tuck shop is a type of confectionery store)
'corpulent friar's bound' is the wordplay.
'corpulent friar's' becomes 'tuck's' (in Robin Hood).
'bound' becomes 'hop' (both can mean to leap or jump).
'tucks'+'hop'='TUCK-SHOP'
'for' acts as a link.
(Other definitions for tuck shop that I've seen before include "what caters for kids" , "Candy store for students" , "Candy store for schoolchildren" , "Place to get food and drink" , "School purveyor of confections" .)