Spray around right shrub container at Badminton (8)
I believe the answer is:
horsebox
'container at badminton' is the definition.
(at the Badminton Horse Trials)
'spray around right shrub' is the wordplay.
'spray' becomes 'hose' (to spray or hose with water).
'around' indicates putting letters inside.
'right' becomes 'r' (common abbreviation).
'shrub' becomes 'box' (a box tree or shrub).
'hose' going around 'r' is 'horse'.
'horse'+'box'='HORSEBOX'
(Other definitions for horsebox that I've seen before include "road trailer" , "It takes animals to the races" , "Equine conveyance" , "Equine transporter" , "Animal transporter" .)