Crossword Genius

Wail about tackling new relative after marriage (2,3)

Ross

I believe the answer is:

in law

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

But I can't explain it at all! Could you help me understand?

(Other definitions for in law that I've seen before include "relative term, maybe" , "as counsel will advise" , "Wife's mother" , "one brought closer with Act of Union" .)

I've seen this clue in The Hindu.
Want a hint initially instead of a full solution? Install my app