Crossword Genius

Kept entertaining Romeo and learned something new (9)

Ross

I believe the answer is:

retrained

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'learned something new' is the definition.
I can't judge whether this defines the answer.

'kept entertaining romeo' is the wordplay.
'kept' becomes 'retained' (retaining is a kind of keeping).
'entertaining' indicates putting letters inside (inviting in, as for dinner).
'romeo' becomes 'r' (phonetic alphabet: alpha, bravo, charlie etc.).
'retained' placed around 'r' is 'RETRAINED'.

'and' acts as a link.

Can you help me to learn more?

(Other definitions for retrained that I've seen before include "made fit for new role" , "On losing job, worker may be" , "prepared for a new role" .)

I've seen this clue in The Guardian.
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