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The vainglorious have not lain with the hearty (8)

Ross

I believe the answer is:

vigorous

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'the hearty' is the definition.
(thesaurus)

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(Other definitions for vigorous that I've seen before include "Powerful, energetic" , "Strong and energetic" , "energetic,strenuous" , "Energetic, strenuous" , "Strong, healthy" .)

I've seen this clue in the Sydney Morning Herald.
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