Taking the rest of the night to elapse, possibly (6)

I believe the answer is:

asleep

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'taking the rest of the night' is the definition.
I can't tell whether this definition defines the answer.

'elapse possibly' is the wordplay.
'possibly' is an anagram indicator.
'elapse' with letters rearranged gives 'ASLEEP'.

'to' is the link.

Can you help me to learn more?

(Other definitions for asleep that I've seen before include "in bed?" , "In the arms fo Morpheus" , "In the arms of Hypnos" , "Napping" , "Out for the count" .)

I've seen this clue in the Evening Standard.

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