Possible Clues:

• Mark how the pitch might get here
• Mark how it's needed for 23 down
• Mark to aim at
• Mark how there's always a bull in rings like this
• How does black get into the middle?
• Mark how black this will get
• Does the miserable one come back and get a mark?
• Mark how this might get a black mark
• Bull in it
• Point to aim at (6).