The most common and most likely answer to this crossword clue is the 8 letter word BETRAYER
B
E
T
R
A
Y
E
R
More clues leading to the result BETRAYER
- Perhaps salver coated in ale and grass
- Rat? Something the waiter brings in beer!
- Teaberry cultivated by one breaking trust
- Snake’s given carrier mild bites?
- Shopper needs carrier to get booze outside
- Shopper‘s item for carrying booze outside
- First of the fish squeezed by stout snake
- Grass and booze covering food carrier
- Trace Queen Elizabeth’s first turncoat
- Perhaps one that’s deserted salver carrying drink? Just the reverse
Buddy explains!

The straight part
We know that "Rat?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rat? = betrayer.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.