Claimed to be curative (7)
I believe the answer is:
medical
'curative' is the definition.
(I've seen this in another clue)
'claimed to be' is the wordplay.
'to be' is an anagram indicator.
'claimed' anagrammed gives 'MEDICAL'.
(Other definitions for medical that I've seen before include "Health check-up" , "Check-up - declaim (anag)" , "Relating to doctoring" , "Relating to treatment rather than surgery" , "Claimed (anag.)" .)