The most common and most likely answer to this crossword clue is the 8 letter word CONTRIVE
C
O
N
T
R
I
V
E
Buddy explains!

The straight part
We know that "Plot" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case plot = contrive.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 CONTRIVE mean?
CONTRIVE verb- To invent by an exercise of ingenuity; to devise
- To invent, to make devices; to form designs especially by improvisation.
- To project, cast, or set forth, as in a projection of light.
- To spend (time, or a period).