Put your name down to sing, maybe (4)

I believe the answer is:

sign

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'put' is the definition.
(signing is a kind of putting)

'your name down to sing maybe' is the wordplay.
'sing' can be anagrammed to 'SIGN'.
But, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for sign that I've seen before include "Notice; omen" , "Communicate to the deaf" , "Augury" , "Evidence" , "Manifestation" .)

I've seen this clue in the Evening Standard.

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