No fighting now - start to consider calm following fury (9)
I believe the answer is:
ceasefire
'no fighting now' is the definition.
'start to consider calm following fury' is the wordplay.
'start to' suggests taking the first letters.
'calm' becomes 'ease' (I've seen this before).
'following' becomes 'f' (used when citing page numbers etc**).
'fury' becomes 'ire' (I've seen this before).
The initial letter of 'consider' is 'c'.
'c'+'ease'+'f'+'ire'='CEASEFIRE'
(Other definitions for ceasefire that I've seen before include "Break in fighting" , "Truce" .)