Alleged fiddler in a finer orchestra (4)

I believe the answer is:

nero

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

'alleged fiddler' is the definition.
'nero' can be an answer for 'fiddler' (I've seen this before). I am not sure about the 'alleged' bit.

'in a finer orchestra' is the wordplay.
'in' indicates a hidden word.
'NERO' is hidden within 'finer orchestra'.

Can you help me to learn more?

(Other definitions for nero that I've seen before include "Imperial Roman fiddler" , "Roman tyrant" , "Ancient Roman emperor" , "Emperor, 'burnt' Rome" , "Ruler" .)

I've seen this clue in the Evening Standard.

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