Related Clues:

• How one might get sick of its being 26 down
• One has the feeling that one can't keep down
• Perhaps I'll be feeling sick of having Una on the ocean
• At last the water makes one want to throw up (6)
• The latter half may give rise to the unpleasant whole of it
• The sort of indisposition the latter half of this can cause
• The lower half of this may cause the whole of it
• Una gets confused and is feeling sick on the sea
• What Una may feel when she's on the end of this
• The second half may cause the whole of the ill-feeling
• You may feel sick of the last of this
• Tummy upset
• Sodium, you heard, at sea leads to sickness
• Vertigo symptom
• Something gotten at an amusement park, maybe