Crossword Genius

Progress doubled on left, so the auctioneer said (5,5,4)

Ross

I believe the answer is:

going going gone

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'the auctioneer said' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'progress doubled on left' is the wordplay.
'progress' becomes 'going' (I've seen this in another clue).
'doubled' says to double the letters.
'on' says to put letters next to each other.
'left' becomes 'gone' (go can mean to leave).
'going' duplicated is 'goinggoing'.
'goinggoing'+'gone'='GOING GOING GONE'

'so' is the link.

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I've seen this clue in The Daily Express.
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