Nods off (4)
'nods off' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for naps that I've seen before include "Snoozes" , "Span including short sleeps" , "Tips; sleeps" , "Takes forty winks" .)
'nods off' is the definition.
('fall asleep' can be a synonym of 'nod off')
This is all the clue.