Changed to "Patched up at one point" (7)
I believe the answer is:
emended
'changed' is the definition.
(I've seen this in another clue)
'patched up at one point' is the wordplay.
'patched up' becomes 'mended' (I've seen this in another clue).
'at' means one lot of letters go next to another (I've seen this in other clues).
'one point' becomes 'e' (compass point).
'mended' after 'e' is 'EMENDED'.
'to' is the link.
(Other definitions for emended that I've seen before include "Rectified" , "Refined" , "did some editing" , "Made corrections" , "Altered" .)