Leaves behind apparent painful discomforts, we hear (9)
I believe the answer is:
overtakes
'painful discomforts we hear' is the definition.
I can't tell whether this definition defines the answer.
'leaves behind apparent' is the wordplay.
'leaves' becomes 'akes' (I can't explain this - if you can you should give a lot more credence to this answer).
'behind' means one lot of letters go next to another.
'apparent' becomes 'overt' (I've seen this before).
'akes' after 'overt' is 'OVERTAKES'.
Can you help me to learn more?
(Another definition for overtakes that I've seen is " Catches up on and passes".)