Crossword Genius

Listen - this muddle needs sorting out! (4)

Ross

I believe the answer is:

hist

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

'muddle needs sorting out' is the definition.
I can't judge whether this definition defines the answer.

'listen this' is the wordplay.
'this' can be anagrammed to 'HIST'.
Though, I'm not clear how this is indicated.

Can you help me to learn more?

(Another definition for hist that I've seen is " Silence".)

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