Crossword Genius

One in a rush to claim riches involved demon girl (4,5)


I believe the answer is:

'one in a rush to claim riches' is the definition.
(person who mines for riches)

'involved demon girl' is the wordplay.
'involved' is an anagram indicator (involved can mean confusing or complex).
'demongirl' anagrammed gives 'GOLD MINER'.

(Another definition for gold miner that I've seen is "fortune hunter".)

I've seen this clue in The Guardian.