See person scarper with vegetable (9)

I believe the answer is:

mangetout

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'vegetable' is the definition.
(I've seen this before)

'see person scarper' is the wordplay.
'see person' becomes 'man' (man is a kind of person).
'scarper' becomes 'getout' (I can't explain this - if you can you should believe this answer much more).
'man'+'getout'='MANGETOUT'

'with' is the link.

Can you help me to learn more?

(Other definitions for mangetout that I've seen before include "Sugar peas" , "something on the plate" , "From this pod" , "Vegetable" , "Edible pea pods" .)

I've seen this clue in The Irish Times.

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