Crossword Genius

Pares back, stingy – 'until tomorrow'? (5,5)

Ross

I believe the answer is:

sleep tight

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''until tomorrow'?' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'pares back stingy' is the wordplay.
'pares' becomes 'peels' ('peel' can be a synonym of 'pare').
'back' says the letters should be written backwards.
'stingy' becomes 'tight' (similar in meaning).
'peels' written backwards gives 'sleep'.
'sleep'+'tight'='SLEEP TIGHT'

Can you help me to learn more?

(Other definitions for sleep tight that I've seen before include "I wish you a restful night" , "Get a good night's rest" .)

I've seen this clue in The Everyman puzzle in The Observer.
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