Related Clues:

• "Ni-i-ice!"
• Massive wave
• "Great!"
• Just peachy
• Gradually expand
• 'Ni-i-ice!'
• Expand abnormally
• Movement of the surface of the sea
• Become larger
• Become larger like toff
• Inflate or enlarge, like posh person
• Informally good, grow larger
• 'Increase in size, number etc (5)'
• "Terrific!"
• Rise in waves