The right to order a meal in the kingdom (5)
I believe the answer is:
realm
'kingdom' is the definition.
(kingdom is a type of country or realm)
'the right to order a meal in' is the wordplay.
'the right' becomes 'r' (common abbreviation).
'to order' indicates an anagram.
'in' is an insertion indicator.
'meal' is an anagram of 'ealm'.
'r' inserted into 'ealm' is 'REALM'.
'the' acts as a link.
(Other definitions for realm that I've seen before include "department" , "King's domain" , "Kingdom's" , "Peers are possessed by this" , "Knowledge base" .)