Crossword Genius

Act One needs rewriting straight away (2,4)

Ross

I believe the answer is:

at once

I'm a little stuck... Click here to teach me more about this clue!

'straight away' is the definition.
'at once' can be an answer for 'away' (thesaurus). I am not certain of the 'straight' bit.

'act one needs rewriting' is the wordplay.
'needs rewriting' indicates anagramming the letters (I've seen this in other clues).
'act'+'one'='actone'
'actone' with letters rearranged gives 'AT ONCE'.

Can you help me to learn more?

(Other definitions for at once that I've seen before include "simultaneously" , "Immediately, this instant" , "without hesitation" , "right away" , "This instant - no delay (2,4)" .)

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