Furry friend of Rosita (4)

I believe the answer is:

elmo

(Other definitions for elmo that I've seen before include "Sesame Street character - patron saint of sailors (with his own fire)" , "Saint whose fire is electric!" , "St ...'s fire, weather phenomenon of coloured glow" , "St ----'s Fire: aura from electrical discharge" , "Saint whose "fire" occurs around masts etc" .)

I've seen this clue in The New York Times.

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