Loud and always creating excitement (5)
I believe the answer is:
fever
'excitement' is the definition.
(fever is a kind of excitement)
'loud and always' is the wordplay.
'loud' becomes 'f' (A musical term**).
'and' says to put letters next to each other.
'always' becomes 'ever' ('ever' can be a synonym of 'always').
'f'+'ever'='FEVER'
'creating' acts as a link.
(Other definitions for fever that I've seen before include "Intense nervous excitement or anticipation?" , "A rise in the temperature from infection" , "excited state" , "Yellow, for example" , "Flu symptom: frenzy" .)