The most common and most likely answer to this crossword clue is the 11 letter word TRAMPOLINES
I've seen this crossword clue in The Guardian
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More clues leading to the result TRAMPOLINES
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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 TRAMPOLINES mean?
TRAMPOLINES noun- A gymnastic and recreational device consisting of a piece of taut, strong fabric stretched over a steel frame using many coiled springs as anchors.
- Any of a variety of looping or jumping instructions in specific programming languages