clue is for right grid and is a normal clue: 8a - detail Sid to miss out incorrect reductions (7) ???O?N? clue is for right hand grid and is normal: 20d ...to naval hero in New Zealand (6) N???E? 4d...
"Tell to seal mouth after Beethoven's ninth a line combining different tunes" -O-T-A-U-T-L
Also "Feeding kid too much material (with a mouth for snake)" -O-T-N...