Piece of sculpture, as on show in grounds (7)
I believe the answer is:
reasons
'grounds' is the definition.
('reason' can be a synonym of 'ground')
'piece of sculpture as on show' is the wordplay.
'piece of' indicates a hidden word.
'REASONS' is hidden in the letters of 'sculpture as on show'.
'in' is the link.
(Other definitions for reasons that I've seen before include "Infers logically" , "Motives, explanations" , "Thinks logically" , "Debates; thinks out" , "excuses" .)