Restrict exploit (5)

I believe the answer is:

stunt

I believe this is a double definition.

'restrict' is the first definition.
(thesaurus)

'exploit' is the second definition.
(stunt is a kind of exploit)

(Other definitions for stunt that I've seen before include "Spectacular exploit" , "Limit the growth of" , "Daring act - cause not to develop" , "Dwarf" , "Spectacularly daring action; retard growth" .)

I've seen this clue in The Independent.

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