Conciliation by a couple of coppers means tee is free (11)
I believe the answer is:
appeasement
'conciliation' is the definition.
(thesaurus)
'a couple of coppers means tee is free' is the wordplay.
'couple of' shows that letters should be duplicated.
'coppers' becomes 'p'.
'is free' indicates anagramming the letters.
'p' doubled is 'pp'.
'means'+'tee'='meanstee'
'meanstee' with letters rearranged gives 'easement'.
'a'+'pp'+'easement'='APPEASEMENT'
'by' acts as a link.
(Other definitions for appeasement that I've seen before include "Action of placating by making concessions" , "Conciliation" , "Act of placating by making concessions" , "Placation" , "Offer of concessions" .)