Personified sleep getting endless hype? Not so! (6)

I believe the answer is:

hypnos

'personified sleep' is the definition.
(personification of sleep in Greek myth)

'endless hype? not so' is the wordplay.
'endless' means to remove the last letter.
'not so' becomes 'nos' (I can't explain this - if you can you should believe this answer much more).
'hype' with its final letter taken away is 'hyp'.
'hyp'+'nos'='HYPNOS'

'getting' acts as a link.

(Another definition for hypnos that I've seen is " Greek god of sleep".)

I've seen this clue in The Guardian.

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