Medical practice, cross and not too good about overdose (9)
I believe the answer is:
chiropody
'medical practice' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'cross and not too good about overdose' is the wordplay.
I cannot really understand how this works, but
'not' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
'about' could be 'c' (abbreviation for circa) and 'c' is located in the answer.
'overdose' could be 'od' (synonyms) and 'od' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for chiropody that I've seen before include "The treatment of feet ailments" , "Foot treatment" , "Treatment of corns, etc." .)