Crossword Genius

Pest on a pet (4)

Ross

I believe the answer is:

flea

'pest on a pet' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for flea that I've seen before include "Jumping, blood-sucking insect" , "Biting type" , "Bloodsucking parasite" , "source of infestation" , "Little jumping insect" .)

I've seen this clue in The Washington Post, the L.A. Times Magazine, the Newsday.com and the LA Times.
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