Hunt it, leaving pretty street (5)
I believe the answer is:
quest
This could be a double definition.
'hunt' is the first definition.
(quest is a kind of hunt)
'it leaving pretty street' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for quest that I've seen before include "Pursuit" , "A search or hunt" , "Long or arduous search" , "Hunt, goal" , "Prolonged search" .)