Crossword Genius

Lab working with kitchen solvent (2,3,5)

Ross

I believe the answer is:

in the black

'solvent' is the definition.
(I've seen this before)

'lab working with kitchen' is the wordplay.
'working with' indicates anagramming the letters (working with the letters).
'lab' anagrammed with 'kitchen' can make 'IN THE BLACK'.

(Other definitions for in the black that I've seen before include "Where roulette ball may land" , "Having money" , "widow may be seen thus" , "Solvent; out of debt" , "able to pay debts" .)

I've seen this clue in The Telegraph.
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