Related Clues:

• The South sounded astonished to be in space
• Gee, it's poisonous enough to be the death of one at last
• This one of 21 across may be the last
• Last gasp comes at last and leaves one quite breathless
• 'Unbelievable!' noise
• "Unbelievable!" noise
• Sound dumbfounded
• [Oh my God!]
• Exclaim breathlessly
• Shocked reaction finding Cleopatra's killer after mid-night
• With the last one you've had it
• Breath of air from south coming through the opening
• Fight for breath while doctor comes round
• Draw breath sharply
• Sudden intake of breath