Old Bob in established yard pockets it as riches? (10)
I believe the answer is:
prosperity
'riches?' is the definition.
(thesaurus)
'old bob in established yard pockets it' is the wordplay.
'old bob' becomes 's' (abbreviation for bob or shilling used before 1971).
'in' is an insertion indicator.
'established' becomes 'proper' (proper can mean established or official).
'yard' becomes 'y' (abbreviation).
'pockets' means one lot of letters goes inside another.
's' going into 'proper' is 'prosper'.
'prosper'+'y'='prospery'
'prospery' going around 'it' is 'PROSPERITY'.
'as' acts as a link.
(Other definitions for prosperity that I've seen before include "Things going well" , "wealth" , "Financial success" .)