A noted bloomer in springtime (6)
I believe the answer is:
easter
'springtime' is the definition.
The definition and answer can be both related to time as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'a noted bloomer' is the wordplay.
'a noted' becomes 'e' (I can't explain this - if you can you should give a lot more credence to this answer).
'bloomer' becomes 'aster' (aster is a kind of flowering plant).
'e'+'aster'='EASTER'
'in' is the link.
Can you help me to learn more?
(Other definitions for easter that I've seen before include "Resurrection festival" , "Christian celebration at the end of Lent" , "Important Christian festival" , "Teaser (anag.)" , "Parade; egg; lily" .)