Squirearchy's got good record (6,6)
I believe the answer is:
landed gentry
'squirearchy's' is the definition.
(synonyms)
'got good record' is the wordplay.
'got' becomes 'landed' (landing is a kind of getting).
'good' becomes 'g' (abbreviation).
'record' becomes 'entry' (eg entry in a list).
'landed'+'g'+'entry'='LANDED GENTRY'
(Other definitions for landed gentry that I've seen before include "The rural nobility" , "Class!" , "'Squirearchy'?" .)