Crossword Genius

Evil king to fall (4)

Ross

I believe the answer is:

sink

'fall' is the definition.
(I know that sink is a type of drop)

'evil king' is the wordplay.
'evil' becomes 'sin' (synonyms).
'king' becomes 'K' (abbreviation for king in chess).
'sin'+'k'='SINK'

'to' acts as a link.

(Other definitions for sink that I've seen before include "(Cause to) become submerged" , "Go down; wash basin" , "Excavate (a well)" , "Washing facility" , "Plumbing fixture" .)

I've seen this clue in The Guardian.
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