The most common and most likely answer to this crossword clue is the 10 letter word CATCHWORDS
I've seen this crossword clue in The Daily Telegraph
C
A
T
C
H
W
O
R
D
S
More clues leading to the result CATCHWORDS
Buddy explains!

The straight part
We know that "slogans" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case slogans = catchwords.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 CATCHWORDS mean?
CATCHWORDS noun- A word under the right-hand side of the last line on a book page that repeats the first word on the following page.
- A word or expression repeated until it becomes representative of a party, school, business, or point of view.
- Among theatrical performers, the last word of the preceding speaker, serving as a cue for the next speaker.