Prizes will produce conflict in advertisements (6)
I believe the answer is:
awards
'prizes' is the definition.
(I know this)
'conflict in advertisements' is the wordplay.
'conflict' becomes 'war' (war is a kind of conflict).
'in' is an insertion indicator.
'advertisements' becomes 'ads' ('ad' can be a synonym of 'advertisement').
'war' going within 'ads' is 'AWARDS'.
'will produce' acts as a link.
(Other definitions for awards that I've seen before include "Prizes for merit or accomplishment" , "Prizes or tributes" , "Prizes and trophies" , "Gives as official payment or prize" , "Gives officially as prizes or penalties" .)