Finish fixing motorway exits (6)
I believe the answer is:
ending
'finish' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for ending that I've seen before include "Finishing" , "Concluding" , "Final part" , "Last part" , "Termination, conclusion" .)