The most common and most likely answer to this crossword clue is the 15 letter word ELECTROMAGNETIC
I've seen this crossword clue in The Times
E
L
E
C
T
R
O
M
A
G
N
E
T
I
C
More clues leading to the result ELECTROMAGNETIC
- Pick Caesar, say, to pen grand quote about kind of force
- Choose eg romantic novel that’s attractive
- Choose backward men and a Pole, about to leave Canada, for on/off attraction
- Choose eccentric German to initially implement curriculum of branch of science
- Magic letter once stirred kind of attraction
- Attractive colt destroyed during race meeting? Altogether awful!
Buddy explains!
The straight part
We know that "kind of force" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case kind of force = electromagnetic.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 ELECTROMAGNETIC mean?
ELECTROMAGNETIC adjective- Relating to electromagnetism