Ends daft foreign conflict with dynamite (3)
I believe the answer is:
tnt
'dynamite' is the definition.
(thesaurus)
'ends daft foreign conflict' is the wordplay.
'ends' says to take the final letters.
The last letters of 'daft foreign conflict' are 'TNT'.
'with' acts as a link.
(Other definitions for tnt that I've seen before include "Explosive compound" , "Very powerful explosive, compressed" , "Explosive stuff" , "Initially, powerful explosive" , "Type of high explosive" .)