Ends an interim arrangement (7)
I believe the answer is:
termini
'ends' is the definition.
(terminus is a kind of end)
'an interim arrangement' is the wordplay.
'arrangement' is an anagram indicator.
'interim' anagrammed gives 'TERMINI'.
(Other definitions for termini that I've seen before include "ends of lines" , "Line ends" , "Final parts" , "End stations" , "Finishing points" .)