Without experience in mine working (3)

I believe the answer is:

new

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'without experience' is the definition.
I can't judge whether this defines the answer.

'in mine working' is the wordplay.
'in' indicates a hidden word.
'NEW' can be found hidden inside 'mine working'.

Can you help me to learn more?

(Other definitions for new that I've seen before include "and 28 and 29: The 365th day" , "Not existing before" , "Seen for the first time" , "Contemporary" , "'Fresh, novel (3)'" .)

I've seen this clue in the Evening Standard.

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