Crossword Genius

Sonar involved in crime (5)

Ross

I believe the answer is:

arson

'crime' is the definition.
(crime of illegally starting a fire)

'sonar involved' is the wordplay.
'involved' indicates an anagram (involved can mean confusing or complex).
'sonar' is an anagram of 'ARSON'.

'in' acts as a link.

(Other definitions for arson that I've seen before include "major crime" , "It may get you in court" , "Criminal pyromania" , "Malicious fire-raising" , "serious offence" .)

I've seen this clue in The Mirror.
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