Crossword Genius

Glare? Good with glares, possibly keeping 1,000 subdued (4,7)

Ross

I believe the answer is:

look daggers

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

'glare?' is the definition.
(I've seen this before)

'good with glares possibly keeping 1000 subdued' is the wordplay.
I cannot quite understand how this works, but
'good' could be 'ok' and 'ok' is found in the answer.
'1000' could be 'g' (G can mean a grand - 1000 pounds, dollars etc) and 'g' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for look daggers that I've seen before include "appear furious" , "Glare" .)

I've seen this clue in The Guardian.
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