Pirate cure can be fake (9)
I believe the answer is:
buccaneer
'pirate' is the definition.
(synonyms)
'cure can be fake' is the wordplay.
'fake' indicates anagramming the letters.
'cure'+'can'+'be'='curecanbe'
'curecanbe' is an anagram of 'BUCCANEER'.
(Other definitions for buccaneer that I've seen before include "Sea wolf" , "Corsair" , "'Sea Rover'" , "Sea robber" , "Unscrupulous opportunist" .)