'Get Brexit Done', perhaps (6)
I believe the answer is:
slogan
'get brexit done perhaps' is the definition.
(I know that Get Brexit Done is a political slogan)
This is all the clue.
(Other definitions for slogan that I've seen before include "short political statement" , "Shibboleth" , "Rallying cry" , "Logo" , "Advertising catchphrase" .)