Beefy nobleman? (5)

I believe the answer is:

baron

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'nobleman?' is the definition.
(baron is a kind of nobleman)

I cannot understand how the rest of the clue works.

(Other definitions for baron that I've seen before include "Title of rank" , "Minor noble" , "A born nobleman" , "Powerful industrialist" , "Titled man for a portion of beef" .)

I've seen this clue in the Evening Standard.

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