Daisy a stunner, lowering temperature (5)
I believe the answer is:
aster
'daisy' is the definition.
(I've seen this before)
'a stunner lowering temperature' is the wordplay.
I cannot really understand how this works, but
'a' is present in the answer.
'temperature' could be 't' (abbreviation) and 't' is found within the answer.
The remaining letters 'ser' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for aster that I've seen before include "Flowering plant; tares (anag.)" , "Purple pink flowered plant" , "Daisy-like garden flower" , "Flower of the daisy family - rates (anag)" , "Garden plant" .)