Yeast and mushrooms, for example (5)

I believe the answer is:

fungi

(Other definitions for fungi that I've seen before include "provides penicillin, etc" , "Organisms studied by a mycologist" , "Plants like mushrooms and toadstools" , "Mushrooms, toadstools etc (5)" , "Spore-producing organisms" .)

I've seen this clue in The Guardian.

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