Requests rubbish tip on-site (9)

I believe the answer is:

petitions

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

'rubbish tip on-site' is the wordplay.
'rubbish' is an anagram indicator (a poor quality or rubbish spelling of the letters).
'tip'+'on'+'site'='tiponsite'
'tiponsite' with letters rearranged gives 'PETITIONS'.

(Another definition for petitions that I've seen is " appeals".)

I've seen this clue in The Times.

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