Crossword Genius

A nobleman's said to show up (6)

Ross

I believe the answer is:

appear

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'show up' is the definition.
(both can mean to arrive)

I don't understand the remainder of the clue.

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(Other definitions for appear that I've seen before include "Develop" , "become available" , "Show up like ghost" , "Seem - come into view" , "Turn up" .)

I've seen this clue in The Sun.
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