Crossword Genius

In an instant I'm a famous lyricist (3,4)

Ross

I believe the answer is:

tim rice

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'a famous lyricist' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'in an instant i'm' is the wordplay.
'in' indicates putting letters inside.
'an instant' becomes 'trice' (both can mean a short amount of time).
'trice' going around 'im' is 'TIM RICE'.

Can you help me to learn more?

(Another definition for tim rice that I've seen is " Chess writer".)

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