Problems with respect to public transport? (7)

I believe the answer is:

rebuses

'problems' is the definition.
(I know this)

'with respect to public transport?' is the wordplay.
'with respect to' becomes 're' ('re' means regarding or about).
'public transport?' becomes 'buses' (I've seen this before).
're'+'buses'='REBUSES'

(Another definition for rebuses that I've seen is " Word-picture puzzles".)

I've seen this clue in The Guardian.

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