A well-bred fellow broker (5)

I believe the answer is:

agent

'broker' is the definition.
(synonyms)

'a well-bred fellow' is the wordplay.
'well-bred fellow' becomes 'gent' (I've seen this in another clue).
'a'+'gent'='AGENT'

(Other definitions for agent that I've seen before include "Negotiator" , "One's representative" , "Dealer" , "Vehicle" , "Factor, spy" .)

I've seen this clue in The Telegraph.

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