Interim changes made at journeys' ends (7)
I believe the answer is:
termini
'ends' is the definition.
(terminus is a kind of end)
'interim changes' is the wordplay.
'changes' is an anagram indicator.
'interim' anagrammed gives 'TERMINI'.
'made at journeys'' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for termini that I've seen before include "Finishing points" , "Stops" , "Railway ends" , "End-of-line stations" , "Line ends" .)