Interim changes for the ends of lines (7)
I believe the answer is:
termini
'the ends of lines' is the definition.
(I've seen this before)
'interim changes' is the wordplay.
'changes' is an anagram indicator.
'interim' anagrammed gives 'TERMINI'.
'for' is the link.
(Other definitions for termini that I've seen before include "End stations" , "End-points" , "Finishing points" , "Starting points, limits" , "Rail stations mainly in city centres" .)