The most common and most likely answer to this crossword clue is the 7 letter word SLOBBER
S
L
O
B
B
E
R
More clues leading to the result SLOBBER
Buddy explains!

The straight part
We know that "slaver" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case slaver = slobber.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 SLOBBER mean?
SLOBBER noun- Liquid material, generally saliva, that dribbles or drools outward and downward from the mouth.
- Muddy or marshy land; mire.
- A jellyfish.
- To allow saliva or liquid to run from one's mouth; to drool.