The most common and most likely answer to this crossword clue is the 8 letter word BRACKISH
I've seen this crossword clue in The Times
B
R
A
C
K
I
S
H
More clues leading to the result BRACKISH
Buddy explains!

The straight part
We know that "Salty" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case salty = brackish.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 BRACKISH mean?
BRACKISH adjective- (of water) Salty or slightly salty, as a mixture of fresh and sea water, such as that found in estuaries.
- Distasteful; unpleasant; not appealing to the taste.
- Repulsive