Crossword Genius

Cunning characters in Omsk order arms, providing misleading information to trick them (5,3,7)

Ross

I believe the answer is:

smoke and mirrors

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

'cunning characters in omsk order arms providing misleading information to trick them' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'cunning characters in omsk order arms providing misleading information to trick them' is the wordplay.
'in omsk order arms' anagrams to 'SMOKE AND MIRRORS'.
However, I am not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for smoke and mirrors that I've seen before include "Trick" , "misleading information" , "Jiggery-pokery" , "Deliberate deception" , "artful deception" .)

I've seen this clue in The Irish Times.
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