Dame Jessica __-Hill, heptathlete (5)

I believe the answer is:

ennis

(Other definitions for ennis that I've seen before include "Poster girl" , "County town of Co Clare, Ireland" , "Southern Irish town" , "our potential 1/4 Across [GOLD MEDALLIST] in 2012" , "World champ" .)

I've seen this clue in The Guardian.

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