Crossword Genius

Evil king's ruin (4)

Ross

I believe the answer is:

sink

'ruin' is the definition.
(thesaurus)

'evil king's' is the wordplay.
'evil' becomes 'sin' (I've seen this before).
'king' becomes 'k'.
'sin'+'k'='SINK'

(Other definitions for sink that I've seen before include "something needed in kitchen" , "Drop in the ocean?" , "place of corruption" , "Invest capital in - kitchen basin - founder" , "Droop, submerge" .)

I've seen this clue in The Telegraph.
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