Journalist, having travelled in, is worn out (6)
I believe the answer is:
eroded
'is worn out' is the definition.
(thesaurus)
'journalist having travelled' is the wordplay.
'journalist' becomes 'ed' (short for editor).
'having' means one lot of letters goes inside another.
'travelled' becomes 'rode' (I've seen this in other clues).
'ed' going around 'rode' is 'ERODED'.
'in' acts as a link.
(Other definitions for eroded that I've seen before include "Eaten away" , "Worn away, ground down" , "Worn away by time, wind or water" , "Wore away" , "Worn away by weather or water" .)