Labour admitting "We are rank" stirred upset (6,1,3,5)

I believe the answer is:

strike a raw nerve

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

'upset' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'labour admitting we are rank stirred' is the wordplay.
'labour' becomes 'strive' (striving is a kind of labouring).
'admitting' is an insertion indicator (admit can mean to welcome in or accept).
'stirred' indicates an anagram.
'we'+'are'+'rank'='wearerank'
'wearerank' is an anagram of 'kearawner'.
'strive' placed around 'kearawner' is 'STRIKE A RAW NERVE'.

Can you help me to learn more?

I've seen this clue in The Independent.

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.