Travelling inward, making port (6)
I believe the answer is:
darwin
'port' is the definition.
(I've seen this before)
'travelling inward' is the wordplay.
'travelling' indicates an anagram.
'inward' is an anagram of 'DARWIN'.
'making' acts as a link.
(Other definitions for darwin that I've seen before include "Strangely inward antipodean city" , "Northern Australia port" , "Evolutionary pioneer" , "Charles ...... originated the theory of evolution" , "Charles ... who put forward theory of evolution" .)