Possible Clues:

• Some Middle East natives
• Jews and Arabs
• People that get set up after 32 down (7)
• Arabs, e.g.
• They're half set back
• 31 across needs to get back to 17 across for such people
• Points this paper raised covering Jews and Arabs
• The sort of people that are half set back
• The people that are half a set up
• Phoenicians, e.g.