Relative first takes day in Paris, no good staying (10)

I believe the answer is:

sojourning

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

'no good staying' is the definition.
I can't tell whether this defines the answer.

'relative first takes day in paris' is the wordplay.
'relative' becomes 'son' (son is a type of relative').
'first' becomes 'ing' (I can't explain this - if you can you should believe this answer much more).
'takes' indicates putting letters inside.
'day in paris' becomes 'jour' (I've seen this in another clue).
'son'+'ing'='soning'
'soning' going around 'jour' is 'SOJOURNING'.

Can you help me to learn more?

I've seen this clue in The Guardian.

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.