Figures the end of the street's as far as one can go (5)
I believe the answer is:
limit
'go' is the definition.
The answer and definition can be both related to time as well as being singular nouns.
Maybe they are linked in a way I don't understand?
I don't 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 "Ceiling" , "Restrict - boundary" , "Restrict to specified range" , "speed restriction applied" , "qualify?" .)