Standard fashion regarding shirts in Northern town (8-2-4)

I believe the answer is:

stockton-on-tees

'northern town' is the definition.
(I've seen this before)

'standard fashion regarding shirts' is the wordplay.
'standard' becomes 'stock' (synonyms).
'fashion' becomes 'ton' (term for style or fashion).
'regarding' becomes 'on' (on or regarding a particular topic).
'shirts' becomes 'tees' (T-shirts).
'stock'+'ton'+'on'+'tees'='STOCKTON-ON-TEES'

'in' is the link.

I've seen this clue in The Times.

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.