The most common and most likely answer to this crossword clue is the 11 letter word HALF-TRUTHS
H
A
L
F
-
T
R
U
T
H
S
Buddy explains!
The straight part
We know that "Semi-fictions" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case semi-fictions = half-truths.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 HALF-TRUTHS mean?
HALF-TRUTHS noun- A deceptive statement, especially one that is only partly true, is incomplete, misrepresents reality by telling part of the truth, or alters the time sequence of truths.