Sound of footsteps of old PM with queen on pitch (6-6)

I believe the answer is:

pitter-patter

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(Other definitions for pitter-patter that I've seen before include "Sound of rain or tiny feet" , "Quick, light tapping sounds" , "Sound of little feet" , "Sound of raindrops" , "Sound of light steps" .)

I've seen this clue in The Times.

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