White sadly retired over capturing a Bishop (9)

I believe the answer is:

alabaster

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'white' is the definition.
(alabaster is a kind of white)

'sadly retired over capturing a bishop' is the wordplay.
'sadly retired over' becomes 'alaster' (I can't explain this - if you can you should give a lot more credence to this answer).
'capturing' indicates putting letters inside.
'bishop' becomes 'B' (chess abbreviation).
'a'+'b'='ab'
'alaster' going around 'ab' is 'ALABASTER'.

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(Other definitions for alabaster that I've seen before include "Material for sculpting" , "Arabs tale (anag.)" , "Altar base (anagr.)" , "Type of gypsum" , "Translucent white gypsum as found carved into ornaments" .)

I've seen this clue in The Telegraph.

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