Naturalist and companion somewhere in south-east France moving inward (7,6)
I believe the answer is:
charles darwin
'naturalist' is the definition.
(Charles Darwin is an example)
'companion somewhere in south-east france moving inward' is the wordplay.
'companion' becomes 'ch' (Companion of Honour).
'somewhere in south-east france' becomes 'Arles' (Arles is a French city).
'moving' indicates anagramming the letters (letters are moved around).
'inward' is an anagram of 'darwin'.
'ch'+'arles'+'darwin'='CHARLES DARWIN'
'and' is the link.
(Other definitions for charles darwin that I've seen before include "Naturalist on HMS Beagle" , "Author of The Descent of Man" , "Great Victorian" .)