Crossword Genius

Note king having trouble with emperor (6)

Ross

I believe the answer is:

mikado

'emperor' is the definition.
(mikado is a kind of emperor)

'note king having trouble' is the wordplay.
'note' becomes 'mi' (as in do-re-mi).
'king' becomes 'K' (chess abbreviation).
'having' is a charade indicator (letters next to each other).
'trouble' becomes 'ado' (both can mean bother or commotion).
'mi'+'k'+'ado'='MIKADO'

'with' acts as a link.

(Other definitions for mikado that I've seen before include "G&S emperor" , "national leader" , "one of 63 [OPERETTAS]" , "Gilbert and Sullivan's emperor" , "mperor" .)

I've seen this clue in The Sun.
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