The most common and most likely answer to this crossword clue is the 8 letter word MARQUEES
M
A
R
Q
U
E
E
S
More clues leading to the result MARQUEES
Buddy explains!

The straight part
We know that "tents" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tents = marquees.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 MARQUEES mean?
MARQUEES noun- A large tent with open sides, used for outdoors entertainment.
- A projecting canopy over an entrance, especially one with a sign that displays the name of the establishment or other information of it.
- (by generalization) Lights that turn on and off in sequence, or scrolling text, as these are common elements on a marquee.
- A banner on a web page displaying text that scrolls horizontally.
- In graphical editing software, a special selection tool, used to highlight a portion of an image.