Crossword Genius

Froth producers (6)

Ross

I believe the answer is:

yeasts

'froth producers' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for yeasts that I've seen before include "Stuff for baker" , "Leavening agents" , "Raising agents, sayest thou?" , "Raising agents in baking" .)

I've seen this clue in the Penny Press.
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