Start first. The street you are in is at the greatest distance (8)
I believe the answer is:
furthest
'at the greatest distance' is the definition.
I can't judge whether this definition defines the answer.
'start first the street you are in' is the wordplay.
'start' says to take the initial letters.
'street' becomes 'st'.
'you are' becomes 'ur' (text or internet abbreviation).
'in' indicates putting letters inside.
The first letter of 'first' is 'f'.
'f'+'the'+'st'='fthest'
'fthest' going around 'ur' is 'FURTHEST'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for furthest that I've seen before include "Most remote" , "Extreme, outermost" .)