Cricket ground – somewhere to go round in retirement (4)
I believe the answer is:
oval
'cricket ground' is the definition.
(London cricket ground)
'somewhere to go round in retirement' is the wordplay.
'somewhere to go' becomes 'lav' (short for lavatory).
'round' becomes 'o' (round can mean a round object).
'in retirement' is a reversal indicator (retire can mean to go back or backwards).
'lav'+'o'='lavo'
'lavo' written backwards gives 'OVAL'.
(Other definitions for oval that I've seen before include "Elliptical - cricket ground" , "Egg-like" , "Courageous" , "Cricket ground - presidential office" , "Surrey county cricket ground" .)