City’s grand boulevard makes a turn, not hairpin (6)
I believe the answer is:
geneva
'city's' is the definition.
(Geneva is an example)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for geneva that I've seen before include "City and lake in SW Switzerland" , "Convention site" , "Calvin's city" , "Alpine lake" , "Swiss city, lake" .)