The most common and most likely answer to this crossword clue is the 7 letter word FULSOME
I've seen this crossword clue in The Guardian
F
U
L
S
O
M
E
More clues leading to the result FULSOME
- Cloying smoke envelops orchestra
- Total amount sounds excessive
- 3/4 engrossed, then a little gross
- Skilful somersault over the top is involved
- Rage about group of musicians being excessive
- Excessive musicians from London seen amid smoke
- Whole calculation, per auditor is over the top
- Healthful somewhat...somewhat tasteless
Buddy explains!

The straight part
We know that "Cloying" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cloying = fulsome.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 FULSOME mean?
FULSOME adjective- Offensive to good taste, tactless, overzealous, excessive.
- Excessively flattering (connoting insincerity).
- Marked by fullness; abundant, copious.
- Fully developed; mature.