The most common and most likely answer to this crossword clue is the 10 letter word ROADWORTHY
R
O
A
D
W
O
R
T
H
Y
Buddy explains!
The straight part
We know that "is allowed in the street" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case is allowed in the street = roadworthy.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 ROADWORTHY mean?
ROADWORTHY adjective- Being able to be driven, or suitable for driving, on the open road.