Changed gear time after time getting to destination (6)
I believe the answer is:
target
'to destination' is the definition.
(thesaurus)
'changed gear time after time' is the wordplay.
'changed' indicates anagramming the letters.
'time' becomes 't'.
'after' means one lot of letters go next to another.
'time' becomes 't' (**).
'gear' anagrammed gives 'arge'.
'arge'+'t'='arget'
'arget' after 't' is 'TARGET'.
'getting' acts as a link.
(Other definitions for target that I've seen before include "What's aimed at" , "Select for attack" , "Goal; victim" , "desired objective" , "aunt Sally" .)