Crossword Genius

Heavy kangaroo? (7)

Ross

I believe the answer is:

bouncer

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This could be a double definition.

'heavy' is the first definition.
(both can mean a member of security staff)

'kangaroo?' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

Can you help me to learn more?

(Other definitions for bouncer that I've seen before include "Dud cheque" , "Chucker-out for nightclub" , "Club doorkeeper" , "One who keeps troublemakers out of a bar" , "A heavy - ball, say" .)

I've seen this clue in The Sun.
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