Circular shape of grounds (5)
I believe the answer is:
round
'circular' is the definition.
('round' can be a synonym of 'circular')
'of grounds' is the wordplay.
'of' indicates a hidden word.
'ROUND' is hidden in the letters of 'grounds'.
'shape' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for round that I've seen before include "Circular - spherical" , "Item of music - single item of ammunition" , "Set of drinks; song" , "Circular - 18 holes" , "Regular route for a sentry" .)