2: Sounds like a bright child (3).
3: Healer making solemn statement about upcoming writers (9)
4: Ornamentation used in the a la mode coronet (5)
5: Will addition show 100 + 0 + 500 + 99 + 49? (7)
6: Leon's accepting prohibition from country (7)
9: Waves of laborers reported (5)
11: Terrier shows how to stray (3)