To leave the country (4)
I believe the answer is:
togo
'the country' is the definition.
(Togo is an example)
'to leave' is the wordplay.
'leave' becomes 'go'.
'to'+'go'='TOGO'
(Other definitions for togo that I've seen before include "Remaining united" , "territory of some West Africans" , "place in Africa" , "West African republic" , "W African republic" .)