Cover conflict, speaking intemperately? (8)
I believe the answer is:
warranty
'cover' is the definition.
(warranty cover is a type of insurance)
'conflict speaking intemperately?' is the wordplay.
'conflict' becomes 'war' (war is a kind of conflict).
'speaking intemperately?' becomes 'ranty'.
'war'+'ranty'='WARRANTY'
(Other definitions for warranty that I've seen before include "cover provided" , "Undertaking that covers sale" , "Undertaking (as to quality)" , "Written guarantee" , "Contract" .)