The most common and most likely answer to this crossword clue is the 8 letter word TURN-OFF
T
U
R
N
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F
F
Buddy explains!
The straight part
We know that "Smaller road/Stop" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case smaller road/stop = turn-off.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TURN-OFF mean?
TURN-OFF noun- Something that repulses, disgusts, or discourages, especially sexually.
- A road where one turns off, such as a motorway exit.