Harry Styles, foxier than everyone else (6)

I believe the answer is:

slyest

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

'foxier than everyone else' is the definition.
I can't tell whether this definition defines the answer.

'harry styles' is the wordplay.
'harry' indicates an anagram (harry can mean to attack or spoil).
'styles' with letters rearranged gives 'SLYEST'.

Can you help me to learn more?

(Other definitions for slyest that I've seen before include "Most cunning" , "most roguish" .)

I've seen this clue in The Guardian.

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