Everyone keeps eye endlessly on lane (5)
I believe the answer is:
alley
'lane' is the definition.
(I know that alley is a type of lane)
'everyone keeps eye endlessly' is the wordplay.
'everyone' becomes 'all' (all people).
'keeps' becomes 'e' (I can't explain this - if you can you should give a lot more credence to this answer).
'endlessly' means to look at the middle letters (the ends of the words are removed).
The centre of 'eye' is 'y'.
'all'+'e'+'y'='ALLEY'
'on' is the link.
Can you help me to learn more?
(Other definitions for alley that I've seen before include "Narrow passageway" , "space in US court" , "Narrow passage" , "garden path" , "Narrow lane; type of cat" .)