Junction layout of west end of Central Line covering page (10)
I believe the answer is:
cloverleaf
'junction layout' is the definition.
(type of road junction design)
'west end of central line covering page' is the wordplay.
'west end of' suggests taking the first letters (the leftmost letter of the word).
'line covering' becomes 'lover' (I can't explain this - if you can you should believe this answer much more).
'page' becomes 'leaf' (I've seen this before).
The first letter of 'central' is 'c'.
'c'+'lover'+'leaf'='CLOVERLEAF'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for cloverleaf that I've seen before include "Level of car (anag) - type of road junction" , "Lucky, if one of four" , "Motorway intersection" .)