Standard feature of most city streets (8)
I believe the answer is:
lamppost
'standard' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'feature of most city streets' is the wordplay.
I cannot really see how this works, but
'of' could be 'o' and 'o' is found within the answer.
'city' could be 'la' (Los Angeles) and 'la' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for lamppost that I've seen before include "Street furniture on which George Formby would lean in song" , "Pillar for street light" , "Enlightenment can be obtained from this" , "Support for public illumination" , "Street light supporter" .)