Just to go round the West End, is not far (5)
I believe the answer is:
metre
'not far' is the definition.
I can't tell whether this defines the answer.
'just to go round the west end' is the wordplay.
'just' becomes 'mere' ('just' can mean 'mere' or 'only').
'to go round' indicates putting letters inside.
'end' indicates one should take the final letters.
The final letter of 'west' is 't'.
'mere' enclosing 't' is 'METRE'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for metre that I've seen before include "Yard is smaller than this" , "Characteristic of feet" , "Basic unit of length" , "Moisture remover" , "39.37 inches" .)