CERN put odd concoction into finished article (3,7)
I believe the answer is:
end product
'finished article' is the definition.
(I've seen this before)
'cern put odd concoction' is the wordplay.
'concoction' indicates anagramming the letters.
'cern'+'put'+'odd'='cernputodd'
'cernputodd' with letters rearranged gives 'END-PRODUCT'.
'into' is the link.
(Other definitions for end product that I've seen before include "Finished item" , "processor's output" , "Result of multiplying" , "outcome" , "finished article" .)