One requiring treatment and prepared to wait (7)
I believe the answer is:
patient
'prepared to wait' is the definition.
(I've seen this before)
'one requiring treatment' is the wordplay.
I cannot really see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
The remaining letters 'patent' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'and' is the link.
Can you help me to learn more?
(Other definitions for patient that I've seen before include "Uncomplaining; invalid" , "doctor's client" , "One receiving medical care" , "Long-suffering - person in hospital" , "Uncomplaining - tolerant" .)