Possible Clues:

• Muslim greeting signifying peace
• One respectfully offered no end of cold food — something for a sandwich, commonly
• Salutation knocked back graduate, sad to say
• Salutation upset mother, sad to say
• From Uppsala, a mighty welcome
• Threat to aircraft that’s coming across in style of greeting
• Respectful gesture as second warning may be heard
• Greeting from Egyptian striker leaving hotel before lunch
• 'Punching the Air' co-author Yusef
• Deep bow of salutation in Arabic-speaking countries