The most common and most likely answer to this crossword clue is the 6 letter word ESTERS
I've seen this crossword clue in Financial Times
E
S
T
E
R
S
More clues leading to the result ESTERS
Buddy explains!
The straight part
We know that "Compounds" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case compounds = esters.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 ESTERS mean?
ESTERS noun- A compound most often formed by the condensation of an alcohol and an acid, with elimination of water, which contains the functional group carbon-oxygen double bond joined via carbon to another oxygen atom.