The most common and most likely answer to this crossword clue is the 16 letter word SELF-EXPLANATORY
S
E
L
F
-
E
X
P
L
A
N
A
T
O
R
Y
Buddy explains!
The straight part
We know that "easily understood" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case easily understood = self-explanatory.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 SELF-EXPLANATORY mean?
SELF-EXPLANATORY adjective- Obvious, having a nature that makes it clear or that explains itself.