The most common and most likely answer to this crossword clue is the 10 plus 9 letter word ELECTRONIC EQUIPMENT
E
L
E
C
T
R
O
N
I
C
E
Q
U
I
P
M
E
N
T
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.