Level junction of street and a road (8)
I believe the answer is:
standard
'level junction' is the definition.
'standard' can be an answer for 'level' (I have seen 'Level of quality ' mean 'standard' so perhaps 'level' could also mean 'standard'). I am not sure about the 'junction' bit.
'street and a road' is the wordplay.
'street' becomes 'st' (abbreviation).
'road' becomes 'rd' (abbreviation).
'st'+'and'+'a'+'rd'='STANDARD'
'of' is the link.
Can you help me to learn more?
(Other definitions for standard that I've seen before include "Touchstone, benchmark 98)" , "Stock - basic - flag" , "Reference point against which other things can be evaluated" , "type of flag" , "Flag - accepted level" .)