Stops me going in for changes (6)
I believe the answer is:
emends
'changes' is the definition.
(I've seen this before)
'stops me going in' is the wordplay.
'stops' becomes 'ends' ('end' can be a synonym of 'stop').
'going in' indicates putting letters inside.
'ends' going around 'me' is 'EMENDS'.
'for' is the link.
(Other definitions for emends that I've seen before include "Alters written material to remove errors" , "Corrects and improves the text" , "Changes" , "Send me (anag.); corrects" , "Makes corrections in written material" .)