Sun spot?

There are a few possibilities for this:

Which length description are you looking for?:

5,5

5,6

10*

solar system

(Other definitions for solar system that I've seen before include "Sun and the planets collectively" , "Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto" , "The sun and its associated bodies" , "Bodies around heater" , "Arrangement of planets around a sun" .)

I've seen this clue in The Washington Post.

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