Moving on to Hereford, a final pint downed? (3,3,3,4)
I believe the answer is:
one for the road
'final pint downed?' is the definition.
'moving on to hereford a' is the wordplay.
'moving' indicates anagramming the letters.
'on'+'to'+'hereford'+'a'='ontohereforda'
'ontohereforda' with letters rearranged gives 'ONE FOR THE ROAD'.
(Other definitions for one for the road that I've seen before include "last order" , "Last drink before leaving" , "A drink before departure" , "The ultimate drink" , "alcoholic drink" .)