Dodgy report, arguably lacking introduction (7)

I believe the answer is:

unsound

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'dodgy' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for unsound that I've seen before include "Faulty" , "Ill-founded" , "Not safe or robust" , "Unreliable, not well" , "Not strong or free from defect - perhaps evidence in court" .)

I've seen this clue in The Times.

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