Shut-eye (5)
I believe the answer is:
sleep
'shut-eye' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sleep that I've seen before include "''... that knits up the ravell'd sleeve of care'' (Macbeth)" , "Doze, nap" , "Shut-eye" , "Snooze" , "crash" .)