Healer Earth's Lib misrepresented (9)
I believe the answer is:
herbalist
'healer' is the definition.
(herbalist is a kind of healer)
'earth's lib misrepresented' is the wordplay.
'misrepresented' indicates an anagram.
'earths'+'lib'='earthslib'
'earthslib' with letters rearranged gives 'HERBALIST'.
(Other definitions for herbalist that I've seen before include "simple job" , "He dispenses simple cures" , "Early botanical writer" .)