Is able to rise in low country (6)
I believe the answer is:
monaco
'country' is the definition.
(Monaco is an example)
'is able to rise in low' is the wordplay.
'is able to' becomes 'can' (I've seen this before).
'rise' says the letters should be written backwards.
'in' is an insertion indicator.
'low' becomes 'moo' ('moo' can be a synonym of 'low').
'can' backwards is 'nac'.
'nac' going within 'moo' is 'MONACO'.
(Other definitions for monaco that I've seen before include "Second smallest sovereign state" , "State of the Grimaldis" , "Principality of the Rainiers" , "Southwest European principality" , "Mediterranean principality" .)