2: Help found in Adelaide. (3)
4: Felt strangely about unfinished age-old recorder (9)
8: Nightwear and jersey top added in afterthought (3)
9: Person with fixed notions is pretty sore, upset about the introduction of Ebonics (11)
11: Conclude a recitation off-key (11)
12: Fish spawn upstream in little orifices (3)
13: De Bergerac hugged bird on return (5)
15: Conceal spring from the narrow-minded (9)
18: One who watches set captor free (9)
21: Year inside for undone expert (5)
22: Polygraph unexpectedly traps vandal (3)
23: Mere chance of depression interrupting peace (11)
25: Fast times with company cracked high-strung recruiter (6,5)
26: Freshen the atmosphere (3)
27: Quiet time to bellow fall, for example (3,6)
28: Former name for joint audition (3)