Need help with a few last clues please ?
6d He sings like a bird! (8) ? A ? ? ? A ? O
aa/8a Its the mature thing to do when done with the 1st. (6,4) S ? ? ? ? ? ? O ? N
22a Old Gaelic harbouring alphabetic mantra (5)
? ? ? A ?
23d 17th parallel will sure go beserk (6) ? ? ? ? S ?
27a Pay everyone a levy - thats a toll (4) ? ? A ?