Unauthorised entry upset bear's family (5-2)

I believe the answer is:

break-in

'unauthorised entry' is the definition.
(illegal entry)

'upset bear's family' is the wordplay.
'upset' is an anagram indicator.
'family' becomes 'kin' (synonyms).
'bear' is an anagram of 'brea'.
'brea'+'kin'='BREAK-IN'

(Another definition for break-in that I've seen is " Criminal entry".)

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.