Sycophant, wanting a larger love, devastated (9)
I believe the answer is:
groveller
'sycophant' is the definition.
(I know that groveller is a type of sycophant)
'wanting a larger love devastated' is the wordplay.
'wanting' indicates named letters should be taken away (wanting can mean lacking).
'devastated' is an anagram indicator (devastate literally means destroy or lay waste to).
'larger'+'love'='largerlove'
'largerlove' with 'a' taken out is 'lrgerlove'.
'lrgerlove' is an anagram of 'GROVELLER'.
(Another definition for groveller that I've seen is " Sycophant".)