5d North African hairdressers' two halves (6) ???B?R
15d Mournfully loud mole gets inside information (8) P?A?G?N?
17d Composer about to bury secret (6) A?C?N?
Thanks for your help iminoz. The answer to 5d appears to be BERBER as a Berber is a member of a North African tribe - according to Chambers. Thanks for putting me on the right road to the answer.