Vigour shown by keener gymnasts (6)

I believe the answer is:

energy

'vigour' is the definition.
(I know that vigour can be written as energy)

'shown by keener gymnasts' is the wordplay.
'shown by' indicates a hidden word.
'ENERGY' is hidden within 'keener gymnasts'.

(Other definitions for energy that I've seen before include "Fuel" , "Zest" , "Vigour, vim, vitality" , "Zeal" , "Exertion of force" .)

I've seen this clue in The Globe and Mail.

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