Crossword Genius

Figure to secure something often knocked down (7)

Ross

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'something often knocked down' is the definition.
I can't judge whether this definition defines the answer.

'figure to secure' is the wordplay.
'figure' becomes 'nine' (a number of figure).
'to secure' becomes 'pin' (pinning is a kind of securing).
'nine'+'pin'='NINEPIN'

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(Other definitions for ninepin that I've seen before include "target to knock over" , "Type of bowling" , "Skittle" , "game" , "What bowler tries to hit" .)

I've seen this clue in the Evening Standard.
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