Go off with a list (4)
I believe the answer is:
rota
'list' is the definition.
(rota is a kind of list)
'go off with a' is the wordplay.
'go off' becomes 'rot' (I've seen this before).
'with' means one lot of letters go next to another.
'rot'+'a'='ROTA'
(Other definitions for rota that I've seen before include "Working times list" , "Duty roster" , "Work schedule" , "Ecclesiastical tribunal" , "supreme Catholic court" .)