A pain at night hurting more around noon (6)
I believe the answer is:
snorer
'a pain at night' is the definition.
I can't tell whether this definition defines the answer.
'hurting more around noon' is the wordplay.
'hurting more' becomes 'sorer' (feeling sore can mean feeling pain).
'around' is an insertion indicator.
'noon' becomes 'n' (abbreviation for noon).
'sorer' placed around 'n' is 'SNORER'.
Can you help me to learn more?
(Other definitions for snorer that I've seen before include "Maker of raucous nocturnal sounds" , "Someone who makes snorting noises while asleep" , "Noisy sleeper" .)