Make changes before publishing new diet (4)
I believe the answer is:
edit
'make changes' is the definition.
(I've seen this in another clue)
'publishing new diet' is the wordplay.
'diet' anagrams to 'EDIT'.
But, I'm unsure how the anagram is indicated.
'before' acts as a link.
Can you help me to learn more?
(Other definitions for edit that I've seen before include "Manage a newspaper" , "Emend" , "Censor" , "doctor" , "Prepare text for publication" .)