Country Norway billed while holding some back (5)
I believe the answer is:
libya
'country' is the definition.
(country in North Africa)
'norway billed while holding some back' is the wordplay.
'holding' indicates the answer is hidden within the clue.
'some back' says the letters should be written backwards.
'aybil' can be found hidden inside 'norway billed while'.
'aybil' written backwards gives 'LIBYA'.
(Other definitions for libya that I've seen before include "Country, capital Tripoli" , "Petroleum-rich African desert country" , "Colonel Gadaffi's country" , "Land" , "N African country" .)