Ignore British dash (8)
I believe the answer is:
brushoff
'ignore' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'british dash' is the wordplay.
I cannot quite understand how this works, but
'british' could be 'br' (abbreviation for British) and 'br' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for brushoff that I've seen before include "Cold shoulder" , "Snub" .)