Takes a nap (6)
(Other definitions for sleeps that I've seen before include "Takes a siesta" , "Rests in the arms of Morpheus" , "Slumbers" , "Dozes" , "Catches some Z's" .)
'takes a nap' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rests that I've seen before include "Relaxes, sleeps" , "Relaxes; supports" , "Musical pauses" , "Takes one's ease" , "Pauses; relaxes" .)