Blooming terrible rates! (5)
I believe the answer is:
aster
'blooming' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'terrible rates' is the wordplay.
'terrible' indicates an anagram.
'rates' is an anagram of 'ASTER'.
Can you help me to learn more?
(Other definitions for aster that I've seen before include "Tears (anag) - plant" , "Stare oddly at the flower" , "Kind of daisy" , "(Starlike) flower" , "Garden plant" .)