It’s annual, this noted flower (6)
I believe the answer is:
easter
'this noted flower' is the definition.
The definition and answer can be both related to time as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'it's annual' is the wordplay.
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'annual' becomes 'aster' (I am not sure about this - if you are sure you should believe this answer much more).
'e'+'aster'='EASTER'
Can you help me to learn more?
(Other definitions for easter that I've seen before include "Church festival" , "Resurrection festival" , "- Day; - bunny" , "Snug retreat" , "Teaser about Christian festival" .)