Tie with Iran may bring apathy (7)
I believe the answer is:
inertia
'apathy' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for inertia that I've seen before include "Passiveness" , "Lack of inclination to move" , "Sort of reel" , "Way of selling" , "Display laziness" .)