Crossword Genius

Invalid transport for one who throws up on the street (9)

Ross

I believe the answer is:

stretcher

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'invalid transport' is the definition.
'stretcher' can be an answer for 'transport' (stretcher is a kind of transport). I'm not sure about the 'invalid' bit.

'one who throws up on the street' is the wordplay.
I cannot quite see how this works, but
'one' could be 'er' (I've seen this in other clues) and 'er' is found within the answer.
'on' could be 're' ('on' can be mean 'with reference to') and 're' is present in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
'street' could be 'st' and 'st' is present in the answer.
The remaining letters 'ch' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).

'for' is the link.

Can you help me to learn more?

(Other definitions for stretcher that I've seen before include "ambulance equipment?" , "one yawning?" , "Carrier for sick/wounded" , "Means of carrying the wounded" , "Horizontal crossbar on a chair" .)

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