Bona fide maiden in kingdom (5)
I believe the answer is:
realm
'kingdom' is the definition.
(kingdom is a type of country or realm)
'bona fide maiden' is the wordplay.
'bona fide' becomes 'real' (I've seen this in other clues).
'maiden' becomes 'm' (cricket abbreviation).
'real'+'m'='REALM'
'in' acts as a link.
(Other definitions for realm that I've seen before include "Monarchy" , "World" , "region" , "Land under a king or queen" , "monarch's responsibility" .)