Second fellow has quiet nap (5)

I believe the answer is:

sleep

I'm a little stuck... Click here to teach me more about this clue!

'nap' is the definition.
(I know that nap is a more specific form of the action sleep)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for sleep that I've seen before include "crash" , "Drop off" , "Shut-eye" , "Slumber" , "''... that knits up the ravell'd sleeve of care'' (Macbeth)" .)

I've seen this clue in The Mirror.

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