Experiment subject (9)
I believe the answer is:
guineapig
(Another definition for guineapig that I've seen is " One experimented with".)
I've seen this clue in the USA Today, the New York Times and the Newsday.com.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.