Crossword Genius

Bigger than reporter's shredder (7)

Ross

I believe the answer is:

greater

I'm a little stuck... Click here to teach me more about this clue!

'bigger' is the definition.
('great' can be similar in meaning to 'big')

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for greater that I've seen before include "of more importance" , "more powerful" , "more imposing scale" , "Larger or more outstanding" , "More extensive" .)

I've seen this clue in the Sydney Morning Herald.
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