See pal knocked out like a light (6)

I believe the answer is:

asleep

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'out like a light' is the definition.
I can't tell whether this definition defines the answer.

'see pal knocked' is the wordplay.
'knocked' indicates anagramming the letters.
'see'+'pal'='seepal'
'seepal' is an anagram of 'ASLEEP'.

Can you help me to learn more?

(Other definitions for asleep that I've seen before include "Dozing" , "Resting unconscious" , "Napping" , "in bed?" , "In the arms fo Morpheus" .)

I've seen this clue in the Sydney Morning Herald.

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