Sun's somehow keeping house policy's irreverence (10)

I believe the answer is:

unholiness

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

'irreverence' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

'sun's somehow keeping house policy's' is the wordplay.
'somehow' indicates an anagram.
'keeping' is an insertion indicator (some letters kept inside).
'house' becomes 'ho' (abbreviation for house).
'policy's' becomes 'line's' (the party line is a party's policy on something).
'sun' with letters rearranged gives 'uns'.
'ho'+'lines'='holines'
'uns' going around 'holines' is 'UNHOLINESS'.

Can you help me to learn more?

(Another definition for unholiness that I've seen is " profanity".)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.