Stretcher required for injured codger, clutching sore foot after roll (6,4)

I believe the answer is:

bungee cord

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'stretcher required for injured codger clutching sore foot' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'roll' is the wordplay.
I cannot quite understand how this works, but
'roll' could be 'bun' (synonyms) and 'bun' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

'after' is the link.

Can you help me to learn more?

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

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