Famous scientist dreamy, wanting diamonds for wife (7)

I believe the answer is:

faraday

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'famous scientist' is the definition.
'faraday' can be an answer for 'scientist' (Michael Faraday). I am not sure about the 'famous' bit.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for faraday that I've seen before include "unit" , "Scientist" , "Michael -, nineteenth century English physicist and chemist" , "English physicist and chemist, d. 1867" , "Man of note" .)

I've seen this clue in The Times.

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