Possible Clues:

• Type of cable
• Is put into taxi for return journey -- simple!
• Degree so elementary
• 'Primary, fundamental (5)'
• Simple almanac is a book about bottles
• Rudimentary — programming language
• Like the A B C's
• Fundamental book, one faithfully reproduced
• Spartan in ancient times touring most of continent
• Elementary school's opening with first graduate in charge