Naturalist close to Greta Thunberg too nervous (12)

I believe the answer is:

attenborough

I'm a little stuck... Click here to teach me more about this clue!

'naturalist' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

'close to greta thunberg too nervous' is the wordplay.
'close to' indicates one should take the final letters (the close/ending of).
'nervous' indicates anagramming the letters (shaking).
The last letter of 'greta' is 'a'.
'thunberg'+'too'='thunbergtoo'
'thunbergtoo' with letters rearranged gives 'ttenborough'.
'a'+'ttenborough'='ATTENBOROUGH'

Can you help me to learn more?

(Other definitions for attenborough that I've seen before include "Member of 7 [ORDER OF MERIT]" , "David -, zoologist, TV presenter" .)

I've seen this clue in The Telegraph.

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