Crossword Genius

Gets over charge for tips (9)

Ross

I believe the answer is:

landfills

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

'gets over charge for' is the wordplay.
'gets' becomes 'lands' (landing is a kind of getting).
'over' is an insertion indicator.
'charge for' becomes 'fill' (I can't explain this - if you can you should give a lot more credence to this answer).
'lands' enclosing 'fill' is 'LANDFILLS'.

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I've seen this clue in The Independent.
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