Most famous grandson of Josiah Wedgwood (6)
I believe the answer is:
darwin
'most famous grandson of josiah wedgwood' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for darwin that I've seen before include "Charles . . . . . . who formulated the theory of evolution" , "Natural scientist and Australian city" , "Turn inward for the antipodean city" , "Australia's northernmost state capital" , "Evolution theorist" .)