Change for a hairstyle (4)

I believe the answer is:

afro

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

'hairstyle' is the definition.
(type of hairstyle)

'change for a' is the wordplay.
'for a' can be anagrammed to 'AFRO'.
Though, I am unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for afro that I've seen before include "Hair in tight curls" , "Shock description" , "Retro hairdo" , "Styling done to hair" , "Luxuriant (black) hairstyle" .)

I've seen this clue in the Evening Standard.

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