Robert —, Irish nationalist leader executed in 1803 (5)

I believe the answer is:

emmet

(Other definitions for emmet that I've seen before include "Irish nationalist - archaic ant - Cornish holiday-maker" , "Ant - to the Cornish, a tourist - met me (anag)" , "Old word for an ant - tourist, according to Cornish locals" , "Old name for an ant" , "Dialect word for an ant" .)

I've seen this clue in The Mirror.

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