Speciality, being loud (5)
I believe the answer is:
forte
I believe this clue is a double definition.
'speciality' is the first definition.
(I know that speciality can be written as forte)
'being loud' is the second definition.
(similar in meaning)
(Other definitions for forte that I've seen before include "Strong point - loudly (in music)" , "Thing at which one excels" , "Skill" , "Loud (mus.)" , "In music, to be played loudly" .)