Crossword Genius

Tiny organism (7)

Ross

I believe the answer is:

microbe

'tiny organism' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for microbe that I've seen before include "Bacillus" , "Disease-causing bacterium" , "Tiny organism that can cause disease" , "Infectious agent" , "minor cause for complaint" .)

I've seen this clue in the LA Times, The Sun and The Sunday Times.
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