Crossword Genius

Extrovert man, foremost of executives, put on board (4)

Ross

I believe the answer is:

lade

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'put on board' is the definition.
(I've seen this in another clue)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Another definition for lade that I've seen is " Take on cargo".)

I've seen this clue in The Sunday Times and The Times.
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