Foreign site, but this is a super cute idea for a clothes line!
Trellis Design Ideas: Wall-Mount Trellises
A narrow yard gains depth and interest with trellises, pergola, pavers and lush garden all set on an angle.:
A well hidden clothesline on back of house! from Homestead Revival blog. Smart idea instead of tacky poles in yard
retractable clothesline Used one for the two weeks I was in California earlier this month. These rock! I was surprised since I've got lines strung at home how much I liked the usefulness of this. There when you need it, gone when you don't!