Just round city, taking left (4)
I believe the answer is:
only
'just' is the definition.
(I know that just can be written as only)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for only that I've seen before include "And nothing more; sole" , "Except that; single" , "Solely; except that" , "Existing alone with no other, perhaps a child" , "Unique; merely" .)