Crossword Genius

PM and Queen talk, in series of minor knocks (6-6)

Ross

I believe the answer is:

pitter-patter

I'm a little stuck... Click here to teach me more about this clue!

'series of minor knocks' is the definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'pm and queen talk' is the wordplay.
'pm' becomes 'pitt' (I've seen this before).
'and' means one lot of letters go next to another.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'talk' becomes 'patter' (I have seen 'Rapid talk ' mean 'patter' so perhaps 'talk' could also mean 'patter'**).
'pitt'+'er'+'patter'='PITTER-PATTER'

'in' is the link.

Can you help me to learn more?

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

I've seen this clue in The Telegraph.
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