Spirea cultivated wins admiration (6)
I believe the answer is:
praise
'wins admiration' is the definition.
'praise' can be an answer for 'admiration' (I have seen 'Express admiration' mean 'praise' so perhaps 'admiration' could also mean 'praise'). I am unsure of the 'wins' bit.
'spirea cultivated' is the wordplay.
'cultivated' indicates an anagram.
'spirea' with letters rearranged gives 'PRAISE'.
Can you help me to learn more?
(Other definitions for praise that I've seen before include "Express approval and admiration" , "Commend or laud" , "Cry 'hallelujah'" , "Applaud, commend" , "Aspire (anag)" .)