Crossword Genius

Square peg moved then to practise intuitive approach quickly, so to speak? (8,2,3,5)

Ross

I believe the answer is:

nineteen to the dozen

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

'quickly so to speak?' is the definition.
('nineteen to the dozen' can mean very quickly)

'square peg moved then to practise intuitive approach' is the wordplay.
I cannot quite see how this works, but
'square' could be 'nine' (I've seen this before) and 'nine' is found in the answer.
'peg' could be 'tee' (tee is a kind of peg) and 'tee' is located in the answer.
'to' is within the answer.
an anagram of 'then' is 'nthe' which is located in the left over letters.
'practise' could be 'do' (synonyms) and 'do' is found in the answer.
'intuitive approach' could be 'zen' (school of Buddhism favouring intuition over study) and 'zen' is located in the answer.
No letters remain.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for nineteen to the dozen that I've seen before include "Speaking thus, one goes quickly" , "(Of speaking, done) in great quantity" .)

I've seen this clue in The Guardian.
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