Charlie snooped around and found out the cost (6)

I believe the answer is:

priced

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'found out the cost' is the definition.
I can't judge whether this definition defines the answer.

'charlie snooped around' is the wordplay.
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'snooped' becomes 'pried' (I've seen this before).
'around' is an insertion indicator.
'c' going into 'pried' is 'PRICED'.

'and' acts as a link.

Can you help me to learn more?

(Other definitions for priced that I've seen before include "Maybe labelled with amount to be paid" , "Costed" , "Valued for sale" , "Assigned value for sale" .)

I've seen this clue in the Evening Standard.

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