The most common and most likely answer to this crossword clue is the 8 letter word OPOPANAX
I've seen this crossword clue in Independent
O
P
O
P
A
N
A
X
More clues leading to the result OPOPANAX
Buddy explains!

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 OPOPANAX mean?
OPOPANAX noun- A gum resin obtained from the root of Opopanax chironium, formerly used in medicine.
- A perfume made from the gum resin of various trees.
- The popinac or opopanax tree (Acacia farnesiana, syn. Vachellia farnesiana), an acacia of America.