It's no use the pair arranging for a decorator (12)

I believe the answer is:

housepainter

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

'it's no use' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'pair arranging for a decorator' is the wordplay.
'pair arranging' becomes 'house' (I can't justify this - if you can you should give a lot more credence to this answer).
'for' means one lot of letters go next to another.
'a decorator' becomes 'painter' (I've seen this before).
'house'+'painter'='HOUSEPAINTER'

'the' is the link.

Can you help me to learn more?

I've seen this clue in The Globe and Mail.

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.