Crossword Genius

Insect that goes marching, in a children's song (3)

Ross

I believe the answer is:

ant

(Other definitions for ant that I've seen before include "Proverbially hard-working insect" , "Six-footer" , "Dec's long-time partner" , "Member of colony" , "` `Go to the ... thou sluggard' '" .)

I've seen this clue in the Universal.
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