Crossword Genius

Big chap who was catapulted to fame (7)

Ross

I believe the answer is:

goliath

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'big chap' is the definition.
The definition and answer can be both people as well as being singular nouns.
I also know that 'big' relates to this answer.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for goliath that I've seen before include "Giant Philistine flattened by David" , "David slew him with a slingshot (7)" , "Giant Philistine killed by David" , "Giant Philistine felled by David" , "Giant David slew" .)

I've seen this clue in The Guardian and The Globe and Mail.
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