Figures the end of the street to be as far as one can go (5)
I believe the answer is:
limit
'go' is the definition.
The definition and answer can be both related to time as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for limit that I've seen before include "speed restriction applied" , "Confine to specific boundary" , "Furthest point" , "Keep in" , "As far as something can go" .)