The most common and most likely answer to this crossword clue is the 17 letter word UNDER-THE-COUNTER
U
N
D
E
R
-
T
H
E
-
C
O
U
N
T
E
R
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 UNDER-THE-COUNTER mean?
UNDER-THE-COUNTER adjective- Illicit, obtained or sold furtively.