Crossword Genius

Something puzzling about public transport (5)

Ross

I believe the answer is:

rebus

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

'something puzzling' is the definition.
I know that 'puzzling' relates to this answer.

'about public transport' is the wordplay.
'about' becomes 're' (regarding).
'public transport' becomes 'bus' (bus is a kind of public transport).
're'+'bus'='REBUS'

Can you help me to learn more?

(Other definitions for rebus that I've seen before include "Puzzling device" , "Word puzzle involving pictures" , "that's puzzling" , "Picture-letter puzzle" , "Enigmatic representation" .)

I've seen this clue in The Independent.
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