Lancashire town immediately north? (7)
I believe the answer is:
preston
'lancashire town' is the definition.
(I've seen this before)
'immediately north?' is the wordplay.
'immediately' becomes 'presto' (synonyms).
'north?' becomes 'N' (synonyms).
'presto'+'n'='PRESTON'
(Other definitions for preston that I've seen before include "Town on the Ribble" , "English city" , "Town in Lancashire" , "city (as of 2002)" , "Administrative centre of Lancashire" .)