Changed gear time after time getting to destination (6)
I believe the answer is:
Here is my best explanation:
'to destination' is the definition.
'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'.
'arget' after 't' is 'TARGET'.
'getting' acts as a link.
(Other definitions for target that I've seen before include "Select for attack", "Point to aim at (6).", "Goal to be aimed for", "bull's eye", "Butt", "Point to shoot at", "That which is aimed at", "desired objective", "Object to be aimed at" and "aunt Sally".)