PM I see suppressing nonsense (7)

I believe the answer is:

asquith

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'pm' is the definition.
(H. H. Asquith, UK prime minister 1908-1916)

'i see suppressing nonsense' is the wordplay.
'i see' becomes 'ah' (exclamation used to indicate understanding).
'suppressing' indicates putting letters inside.
'nonsense' becomes 'squit' (I can't explain this - if you can you should give a lot more credence to this answer).
'ah' enclosing 'squit' is 'ASQUITH'.

Can you help me to learn more?

(Other definitions for asquith that I've seen before include "PM 1908-16" , "Politician" , "Old PM" , "Liberal statesman" , "Former Prime Minister" .)

I've seen this clue in The Telegraph.

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