Will one see you if you can't go? (9)
I believe the answer is:
urologist
'will' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'one see you if you can't go?' is the wordplay.
I cannot really see how this works, but
'one' could be 'o' (I've seen this in other clues) and 'o' is present in the answer.
'see' could be 'lo' (archaic exclamation meaning 'look!') and 'lo' is found in the answer.
'you' could be 'u' (homophones) and 'u' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for urologist that I've seen is " Doctor specialising in the waterworks?".)