Crossword Genius

Regain consciousness, seeing nothing behind celestial object (6)

Ross

I believe the answer is:

cometo

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'regain consciousness' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'nothing behind celestial object' is the wordplay.
'nothing' becomes 'O' (O resembles 0).
'behind' says to put letters next to each other.
'celestial object' becomes 'comet' (I've seen this before).
'o' after 'comet' is 'COMETO'.

'seeing' is the link.

Can you help me to learn more?

I've seen this clue in The Daily Express.
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