Quite like American lady being fairly vulgar (8)

I believe the answer is:

broadish

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

'quite like american' is the definition.
The definition suggests an adjective which matches the answer.

'lady being fairly vulgar' is the wordplay.
'lady' becomes 'broad'.
'being fairly vulgar' becomes 'ish' (I can't justify this - if you can you should believe this answer much more).
'broad'+'ish'='BROADISH'

Can you help me to learn more?

(Another definition for broadish that I've seen is " rather coarse".)

I've seen this clue in The Sunday 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.