Shorten, perhaps (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
edit
'shorten perhaps' is the definition.
(shortening is a kind of editing)
This is the entire clue.
(Other definitions for edit that I've seen before include "Redact, perhaps" , "Revise - expurgate" , "amend copy" , "Adjust text" , "Rewrite" .)