* Worker car injured jerk in the far south (9,6)

I believe the answer is:

antarctic circle

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

'far south' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Perhaps you can see an association between them that I can't see?

'worker car injured jerk in the' is the wordplay.
'worker' becomes 'ant' (worker is a type of ant).
'injured' indicates anagramming the letters.
'jerk' becomes 'tic' (jerking movement by the body).
'in the' becomes 'circle' (I can't justify this - if you can you should give a lot more credence to this answer).
'car' with letters rearranged gives 'arc'.
'ant'+'arc'+'tic'+'circle'='ANTARCTIC CIRCLE'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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.