The country bears it in mind (7)
I believe the answer is:
Here is my best explanation:
'the country' is the definition.
(Britain is an example)
'it in mind' is the wordplay.
'in' indicates putting letters inside.
'mind' becomes 'brain' ('brain' can be a synonym of 'mind').
'it' going within 'brain' is 'BRITAIN'.
'bears' acts as a link.
(Other definitions for britain that I've seen before include "state", "Island north of France", "UK's largest island", "Main part of UK", "State", "See 10", "Country", "England, Scotland, Wales and Northern Ireland", "Largest UK island" and "Monarchy".)