Eccentric slays rich developer (9)
I believe the answer is:
chrysalis
'developer' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'eccentric slays rich' is the wordplay.
'eccentric' indicates anagramming the letters.
'slays'+'rich'='slaysrich'
'slaysrich' with letters rearranged gives 'CHRYSALIS'.
Can you help me to learn more?
(Other definitions for chrysalis that I've seen before include "insect developing" , "Pre-butterfly stage" , "Dormant insect pupa" , "Cocooned pupa of a moth or butterfly" , "Pupa of an insect such as a butterfly" .)