Doctor claimed what she could do (7)

I believe the answer is:

medical

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'doctor' is the definition.
(thesaurus)

'claimed what she could do' is the wordplay.
'claimed' anagrams to 'MEDICAL'.
Though, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for medical that I've seen before include "Doctor's test" , "Of the science dealing with treatment of disease" , "Relating to the art of healing" , "Declaim (anag) -- health check" , "Health check-up" .)

I've seen this clue in The Times.

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