Crossword Genius

Do no more about problems raised by Queen (4,6)

Ross

I believe the answer is:

pass muster

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

'do' is the definition.
(I've seen this before)

'no more about problems raised by queen' is the wordplay.
'no more' becomes 'past' (I can't explain this - if you can you should give a lot more credence to this answer).
'about' is an insertion indicator.
'problems' becomes 'sums' (arithmetic problems).
'raised by' shows that the letters should be reversed in order.
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'sums' written backwards gives 'smus'.
'past' going around 'smus' is 'passmust'.
'passmust'+'er'='PASS MUSTER'

Can you help me to learn more?

(Other definitions for pass muster that I've seen before include "Be good enough" , "appear acceptable" , "To fit the bill" , "Satisfy, suffice" .)

I've seen this clue in The Guardian.
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