Sound is a little faint, actually (6)
I believe the answer is:
intact
'sound' is the definition.
(I've seen this before)
'a little faint actually' is the wordplay.
'a little' says the answer is hidden in the clue.
'INTACT' can be found hidden inside 'faint actually'.
'is' acts as a link.
(Other definitions for intact that I've seen before include "Undiminished" , "Undamaged, not broken" , "Complete - unbroken" , "All in one piece" , "Complete - undamaged" .)