Crossword Genius

Variable working horror — cue to act over numbers initially on it? (4-4,8)

Ross

I think it could be either:

Which length description are you looking for?:

4

4-4,8

zero-hour contract

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'variable working' is the definition.

'horror cue to act over numbers initially on it?' is the wordplay.
I cannot quite understand how this works, but
'act' could be 'contract' (contract is a kind of act) and 'contract' is found in the answer.
'over' could be 'o' (cricket abbreviation) and 'o' is present in the answer.
'it?' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found within the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Guardian.
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