A quiet work in the charts? Probably not! (3)

I believe the answer is:

pop

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'the charts? probably not' is the definition.
I can't tell whether this defines the answer.

'a quiet work' is the wordplay.
'a quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'work' becomes 'op' (abbreviation for opus).
'p'+'op'='POP'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for pop that I've seen before include "Youthful music for dad?" , "Thus goes the weasel in song" , "Soft drink - father - music - light explosion" , "Sound of a balloon bursting" , "'American Dad'!" .)

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

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