Second editor leaving, reprimanded (6,3)
I believe the answer is:
ticked off
'reprimanded' is the definition.
(I've seen this before)
'second editor leaving' is the wordplay.
'second' becomes 'tick' (both can mean a very short amount of time**).
'editor' becomes 'ed'.
'leaving' becomes 'off' (I've seen this in other clues).
'tick'+'ed'+'off'='TICKED OFF'
(Other definitions for ticked off that I've seen before include "criticised" , "Delivered carpeting" , "Reprimanded" , "marked completed items?" , "dressed down" .)