Stage finished thanks to such support? (5)

I believe the answer is:

legup

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'thanks to such support?' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'stage finished' is the wordplay.
'stage' becomes 'leg' (a leg is a stage of a competition).
'finished' becomes 'up' (eg 'time's up' means the time is finished).
'leg'+'up'='LEGUP'

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I've seen this clue in The Irish Times.

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