A canape prepared as a cure-all (7)
I believe the answer is:
panacea
'a cure-all' is the definition.
(I know that cure-all can be written as panacea)
'a canape prepared' is the wordplay.
'prepared' indicates an anagram.
'a'+'canape'='acanape'
'acanape' anagrammed gives 'PANACEA'.
'as' is the link.
(Other definitions for panacea that I've seen before include "Remedy for all kinds of diseases or troubles" , "Panpharmacon" , "Remedy for wide variety of ills, a cure-all" , "offering solution to all ills" , "universal solution" .)