Right meal cooked in province (5)
I believe the answer is:
realm
'province' is the definition.
(I've seen this in another clue)
'right meal cooked in' is the wordplay.
'right' becomes 'r' (common abbreviation).
'cooked' indicates anagramming the letters (letters cooked into a new form).
'in' indicates putting letters inside.
'meal' with letters rearranged gives 'ealm'.
'r' put inside 'ealm' is 'REALM'.
(Other definitions for realm that I've seen before include "where ruler holds sway?" , "Country" , "Land under a king or queen" , "Kingdom; field of interest" , "Monarchy" .)