Actually it's a lot bigger than a Michaelmas daisy! (3)
I believe the answer is:
elm
'daisy' is the definition.
The definition and answer can be both plants as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'actually it's a lot bigger than a michaelmas' is the wordplay.
'ELM' is hidden in amongst the letters.
However, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for elm that I've seen before include "Species of tree" , "Tree with a Dutch disease" , "Hard wood" , "Stately tree" , "Kind of tree" .)