I'm noisy at exercising, creating ill will (9)
I believe the answer is:
animosity
'ill will' is the definition.
(animosity is a kind of ill will)
'i'm noisy at exercising' is the wordplay.
'exercising' indicates an anagram.
'im'+'noisy'+'at'='imnoisyat'
'imnoisyat' is an anagram of 'ANIMOSITY'.
'creating' acts as a link.
(Other definitions for animosity that I've seen before include "Hatred" , "Ill-will" , "Maoist yin generates spirit of hostility" , "A spirit of hostility, enmity" , "Hostile feeling" .)