Dodgy device used by one who bows and scrapes? (6)

I believe the answer is:

fiddle

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'dodgy device' is the definition.
'fiddle' can be an answer for 'device' (fiddle is a kind of device). I am unsure of the 'dodgy' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for fiddle that I've seen before include "Commit fraud; instrument" , "something stringy?" , "Trivial things" , "Steal from one's employer" , "Violin; falsify (figures)" .)

I've seen this clue in the Evening Standard.

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