The most common and most likely answer to this crossword clue is the 4 letter word JEDI
I've seen this crossword clue in The Daily Telegraph
J
E
D
I
More clues leading to the result JEDI
- Sci-fi knights turned up alongside jail guards
- Knight‘s the first person in Paris I’d backed
- Forceful people in films turned some characters for inside job
- Judge backing up leaderless faction — they’re linked to Rebel Alliance
- Samurai dejected about beleaguering virtuous warrior
- At first, Jimi Hendrix regularly shown to be forceful character?
Buddy explains!
The straight part
We know that "Forceful people in films" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case forceful people in films = jedi.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.