Crossword Genius

One enters playing trill etc, kind of rock singer (6,7)

Ross

I believe the answer is:

little richard

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

'rock singer' is the definition.

'one enters playing trill etc kind' is the wordplay.
I cannot really see how this works, but
'one' could be 'li' (I've seen this in other clues) and 'li' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

'of' acts as a link.

Can you help me to learn more?

I've seen this clue in The Guardian.
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