Microphone essential for Rooney? (6)

I believe the answer is:

mickey

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'rooney?' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

'microphone essential' is the wordplay.
'microphone' becomes 'mic'.
'essential' becomes 'key' (key can mean essential or important).
'mic'+'key'='MICKEY'

'for' is the link.

Can you help me to learn more?

(Other definitions for mickey that I've seen before include "To take the - is to ridicule or tease someone" , "Walt Disney creation" , "Doctored drink" , "- Finn; - Mouse" , "Disney mouse" .)

I've seen this clue in The Sun.

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