Crossword Genius

A British party is caught after doing a U-turn, sharp (8)

Ross

I believe the answer is:

abrasive

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

'a u-turn sharp' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I can't see?

'a british party is caught after doing' is the wordplay.
I cannot quite understand how this works, but
'a' is found in the answer.
'british' could be 'br' (abbreviation for British) and 'br' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for abrasive that I've seen before include "Harsh - scratchy" , "One that wears" , "Harsh or insensitive in manner" , "Grinding substance" , "Rough, as sandpaper" .)

I've seen this clue in The Guardian.
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