No, not something a showjumper wants? (7)

I believe the answer is:

refusal

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'not something a showjumper wants?' is the definition.
(refusal can mean a horse refusing to make a jump)

I don't understand the rest of the clue.

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(Other definitions for refusal that I've seen before include "The turning down of a request" , "Horse's action in declining to jump a fence" , "Stop by fence" , "Being told no to request, will not oblige" , "Declining of an offer" .)

I've seen this clue in The Telegraph.

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