All, I bet, very worried (5,3)

I believe the answer is:

every bit

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'all' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'i bet very worried' is the wordplay.
'worried' indicates anagramming the letters.
'i'+'bet'+'very'='ibetvery'
'ibetvery' anagrammed gives 'EVERY BIT'.

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