Exciting article about new instrument (8)
I believe the answer is:
clarinet
'instrument' is the definition.
(I know that clarinet is a type of single-reed woodwind)
'exciting article about new' is the wordplay.
'exciting' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'article' anagrammed gives 'clariet'.
'clariet' enclosing 'n' is 'CLARINET'.
(Other definitions for clarinet that I've seen before include "Musical wind instrument as played by Benny Goodman" , "It's for playing" , "Blow that!" , "Woodwind instrument played by Artie Shaw and Benny Goodman" , "Source of music" .)