State of Slovenia mired in revolution, somewhat (5)
I believe the answer is:
maine
'state' is the definition.
(Maine is an example)
'slovenia mired in revolution somewhat' is the wordplay.
'somewhat' indicates the answer is hidden within the clue.
'in revolution' is a reversal indicator.
'eniam' is hidden in the letters of 'slovenia mired'.
'eniam' back-to-front is 'MAINE'.
'of' is the link.
(Other definitions for maine that I've seen before include "state of USA" , "The USA's Pine Tree State" , "Part of America" , "NE US state" , "American state, capital Augusta" .)