Wildly chants a little piece of music (6)

I believe the answer is:

snatch

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

'piece of music' is the definition.
(I've seen this before)

'wildly chants a little' is the wordplay.
'chants' can be anagrammed to 'SNATCH'.
Though, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for snatch that I've seen before include "Snippet" , "Grasp hurriedly" , "pull" , "Seize suddenly" , "Style of weightlifting" .)

I've seen this clue in the Evening Standard.

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