Will such a risky thing inhibit growth? (5)

I believe the answer is:

stunt

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'will' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

I can't explain the rest of the clue.

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(Other definitions for stunt that I've seen before include "Check the growth of (something)" , "Hamper - exploit" , "Restrict growth" , "Publicity seeking escapade" , "Inhibit - exploit" .)

I've seen this clue in the Evening Standard.

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