Official musical instrument? (8)
I believe the answer is:
recorder
I believe this is a double definition.
'official' is the first definition.
(I know that recorder is a type of official)
'musical instrument?' is the second definition.
(I know that recorder is a type of open flutes with internal duct with fingerholes)
(Other definitions for recorder that I've seen before include "Annalist" , "Musical instrument or note-taker" , "One taking down notes" , "Wind instrument - instrument for transferring sound to tape" , "Registrar" .)