Crossword Genius

Expert in doing wrong shows I’m storing coil faultily? (13)

Ross

I believe the answer is:

criminologist

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

'expert in doing wrong' is the definition.
(expert in crime)

'i'm storing coil faultily?' is the wordplay.
'i'm storing coil' can be anagrammed to 'CRIMINOLOGIST'.
However, I am not sure how this is indicated.

'shows' acts as a link.

Can you help me to learn more?

(Other definitions for criminologist that I've seen before include "One studying law-breakers" , "Scientist studying offenders" , "Low-life expert" , "One studying felons" , "Forensic expert" .)

I've seen this clue in The Times.
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