Tired of endless border change (5)
I believe the answer is:
bored
'tired' is the definition.
('bore' can be a synonym of 'tire')
'endless border change' is the wordplay.
'endless' means to remove the last letter.
'change' indicates anagramming the letters.
'border' with its last letter removed is 'borde'.
'borde' with letters rearranged gives 'BORED'.
'of' acts as a link.
(Other definitions for bored that I've seen before include "Pierced" , "Feeling weary and uninterested" , "Drilled (a hole)" , "Weary and impatient" , "World-weary" .)