Dough raiser (5)
I believe the answer is:
yeast
'dough raiser' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yeast that I've seen before include "Baker's raising agent" , "Brewing agent" , "Androgynous" , "Fungus used in brewing and baking" , "Fungus; food supplement" .)