Dad, can I mix up yeast? (7)
I believe the answer is:
candida
'up yeast?' is the definition.
The definition and answer can be both plants as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'dad can i mix' is the wordplay.
'mix' indicates anagramming the letters.
'dad'+'can'+'i'='dadcani'
'dadcani' anagrammed gives 'CANDIDA'.
Can you help me to learn more?
(Other definitions for candida that I've seen before include "GBS play" , "by G.B. Shaw" , "Fungus" , "Parasite" .)