Currency of Laos (3)
I believe the answer is:
kip
'currency of laos' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for kip that I've seen before include "Slumber" , "Sleep (sl.)" , "Sleep, nap (colloq.)" , "Snooze" , "Nap (slang)" .)