Left out until rewritten (5)

I believe the answer is:

unlit

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'left out' is the definition.
'unlit' can be an answer for 'out' (I've seen this in another clue). I am not certain of the 'left' bit.

'until rewritten' is the wordplay.
'rewritten' indicates anagramming the letters.
'until' is an anagram of 'UNLIT'.

Can you help me to learn more?

(Other definitions for unlit that I've seen before include "With no lighting" , "Left in the dark" , "Not yet fired up" , "Lacking illumination" , "Shady" .)

I've seen this clue in The Globe and Mail.

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