Street's shapes of moon (9)
I believe the answer is:
crescents
'street's shapes of moon' is the definition.
I can't tell whether this defines the answer.
'street's shapes' is the wordplay.
'street' becomes 'crescent' (crescent-shaped street).
'shapes' becomes 's' (this could be a standard abbreviation I've not previously seen).
'crescent'+'s'='CRESCENTS'
Can you help me to learn more?
(Other definitions for crescents that I've seen before include "Things shaped like the waxing moon" , "Parts of a circle, shapes of the moon at certain times" , "bent ways" .)