Crossword Genius

What you must be if you want to see a busy doctor (7)

Ross

I believe the answer is:

patient

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'doctor' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for patient that I've seen before include "Willing to wait" , "Sufferer" , "Long-suffering - one under treatment" , "Uncomplaining - tolerant" , "Cool" .)

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