The most common and most likely answer to this crossword clue is the 8 letter word CANTEENS
I've seen this crossword clue in The Daily Telegraph
C
A
N
T
E
E
N
S
More clues leading to the result CANTEENS
Buddy explains!
The straight part
We know that "restaurants" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case restaurants = canteens.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 CANTEENS mean?
CANTEENS noun- A small cafeteria or snack bar, especially one in a military establishment, school, or place of work.
- A temporary or mobile café used in an emergency or on a film location etc.
- A box with compartments for storing eating utensils, silverware etc.
- A military mess kit.
- A water bottle used by a soldier or camper.