Crossword Genius

No servant recalled duke, a very special chap (7)

Ross

I believe the answer is:

diamond

'a very special chap' is the definition.
(diamond can mean a great person)

'no servant recalled duke' is the wordplay.
'servant' becomes 'maid' (maid is a kind of servant).
'recalled' says the letters should be written backwards.
'duke' becomes 'd' (abbreviation).
'no'+'maid'='nomaid'
'nomaid' backwards is 'diamon'.
'diamon'+'d'='DIAMOND'

(Other definitions for diamond that I've seen before include "shape" , "Very hard gem" , "American field" , "Birthstone for April" , "(Usually colourless) gemstone - card" .)

I've seen this clue in The Times.
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