Curative, it could be claimed (7)
I believe the answer is:
medical
'curative' is the definition.
(I've seen this in another clue)
'it could be claimed' is the wordplay.
'it could be' indicates an anagram (I've seen this in other clues).
'claimed' is an anagram of 'MEDICAL'.
(Other definitions for medical that I've seen before include "Relating to doctors" , "Of the science dealing with treatment of disease" , "Fitness examination" , "Relating to doctoring" , "Test for health" .)