Crossword Genius

Hmm! Aye! That could cause chaos! (6)

Ross

I believe the answer is:

mayhem

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

'chaos' is the definition.
(I've seen this in another clue)

'hmm aye that could cause' is the wordplay.
'hmm aye' anagrams to 'MAYHEM'.
However, I am not clear how this is indicated.

Can you help me to learn more?

(Other definitions for mayhem that I've seen before include "Much trouble when" , "Big trouble!" , "Chaos, violent disorder" , "State of great confusion and disorder" , "violence" .)

I've seen this clue in The Sun.
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