Performing inside, drunk before morning (7)

I believe the answer is:

tonight

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'before morning' is the definition.
The answer and definition can be both related to time as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'performing inside drunk' is the wordplay.
'performing' becomes 'on' (as in being on stage).
'inside' is an insertion indicator.
'drunk' becomes 'tight' (slang term).
'on' going inside 'tight' is 'TONIGHT'.

Can you help me to learn more?

(Other definitions for tonight that I've seen before include "next retirement occasion" , "Dark time ahead" , "now or very soon" , "Later this evening" , "Hotting (anag.)" .)

I've seen this clue in The Daily Express.

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