All these questions the answer contain a colour

[cameroon]

A useless or Troublesome thing? 5,8
Used in manicures 6,5
Royal flight route 6,6
Type of Old dark ale 5,5
Brilliant red pigment 10
Past one end of the spectrum 11
A seaman in the Navy 10

[Llamatron]

The first one could be 'white elephant'

[shaneystar2]

Used in manicures orange stick

[shaneystar2]

A seaman in the Navy...Bluejacket
Past one end of the spectrum ... Ultraviolet
Type of Old dark ale...Brown Stout
Brilliant red pigment ..Vermillion

These questions should really be posted in Quizzes and Puzzles

[janetsflower]

the royal flight route is definately purple but ican't remember purple what, it might be ribbon but its the height at which only royal aircraft can fly at and i read about it in paul burrells book