Possible Clues:

• Unit of frequency
• 1,000 cycles per second
• Bump off and an injury's reported, for many cycles in time
• Measure of a radio band
• It could measure high pitch frequency taken from folk dancing with zither
• Measure: one that would end life on Mars some say
• King attacked Hitler with love at last and some frequency
• Measurement of frequency equal to 1,000 cycles per second
• Frequency of 1,000 cycles per second
• Radio 4 at 198 of these