A port for the famous naturalist (6)
I believe the answer is:
darwin
This might be a double definition.
'a port' is the first definition.
(I've seen this before)
'famous naturalist' is the second definition.
'darwin' can be an answer for 'naturalist' (Darwin is an example). I'm not sure about the 'famous' bit.
'for the' acts as a link.
Can you help me to learn more?
(Other definitions for darwin that I've seen before include "Evolution scientist and city" , "Evolutionary pioneer" , "Charles . . . . . . who formulated the theory of evolution" , "Naturalist, author" , "Australian port, capital of the Northern Territory" .)