In Lancs, you'll be quick to get to its North End (7)
I believe the answer is:
preston
'in lancs you'll' is the definition.
I can't tell whether this definition defines the answer.
'quick to get to its north end' is the wordplay.
I cannot quite understand how this works, but
'quick' could be 'presto' (I've seen this before) and 'presto' is found within the answer.
'north' could be 'n' (abbreviation) and 'n' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'be' is the link.
Can you help me to learn more?
(Other definitions for preston that I've seen before include "City in Lancashire" , "English city" , "Town in Lancashire" , "Administrative centre of Lancashire" , "Town on the Ribble" .)