Crossword Genius

King left donkey going around rich source of wealth (8)

Ross

I believe the answer is:

klondyke

'rich source of wealth' is the definition.
(Canadian region which historically provided gold)

'king left donkey going around' is the wordplay.
'king' becomes 'K' (abbreviation for king in chess).
'left' becomes 'L' (common abbreviation).
'going around' indicates an anagram.
'donkey' anagrammed gives 'ondyke'.
'k'+'l'+'ondyke'='KLONDYKE'

I've seen this clue in The Independent.
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