Now Arsenal has conflicts (4)
I believe the answer is:
wars
'conflicts' is the definition.
(I know this)
'now arsenal has' is the wordplay.
'has' indicates a hidden word.
'WARS' is hidden in the letters of 'now arsenal'.
(Other definitions for wars that I've seen before include "Armed conflicts against enemies" , "Battles" , "See 8" , "- - of the Roses" .)