Crossword Genius

They professionally stir boxers with messy hair (5,5)

Ross

I believe the answer is:

shock jocks

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

'they professionally stir boxers with messy' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'hair' is the wordplay.
I cannot quite understand how this works, but
'hair' could be 'shock' (I've seen this before) and 'shock' is found in the answer.
The remaining letters 'jocks' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
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