Irreverent about former monarch and very resistant to change? (10)
I believe the answer is:
impervious
'resistant to change?' is the definition.
I can't judge whether this definition defines the answer.
'irreverent about former monarch and very' is the wordplay.
'irreverent' becomes 'impious' (similar in meaning).
'about' is an insertion indicator.
'former monarch' becomes 'ER' (Elizabeth Regina, ie Queen Elizabeth).
'and' says to put letters next to each other.
'very' becomes 'v' (common abbreviation).
'er'+'v'='erv'
'impious' going around 'erv' is 'IMPERVIOUS'.
Can you help me to learn more?
(Another definition for impervious that I've seen is " impossible to pass".)