Raw bananas eaten by Indian running after a naturalist (9)

I believe the answer is:

darwinian

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'after a naturalist' is the definition.
I can't judge whether this defines the answer.

'raw bananas eaten by indian running' is the wordplay.
'bananas' indicates anagramming the letters (bananas can informally mean crazy).
'eaten by' is an insertion indicator (inserted letters get eaten).
'running' indicates an anagram (the letters run around to different places).
'raw' anagrammed gives 'arw'.
'indian' is an anagram of 'dinian'.
'arw' going into 'dinian' is 'DARWINIAN'.

Can you help me to learn more?

(Other definitions for darwinian that I've seen before include "Evolutionary" , "no Creationist" .)

I've seen this clue in The Guardian.

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