* The Literal: Seven spiders spinning silk would likely all be successful in spinning, unless something unfortunate happened to them.
* The Figurative: The riddle might be about the fate of the *threads* the spiders spin.
Possible Solutions:
* "Seven threads, one web" - This could mean all the threads are woven together into a single web.
* "Seven threads, seven fates" - Each thread could represent a separate destiny, implying the spiders' creations might have different outcomes.
* "Seven threads, undone by the wind" - The threads could be disrupted or destroyed, highlighting the fragility of their work.
To solve it, you might need more context. What other clues are there?