13 is related to 7, if you are not considering 7 as being related to 10!!
4 is a UK slang term which caused problems when this quiz was used over here as well. (I remember it from the old Jennings books,) If in doubt, think of a 'Nose job' (Chambers C20th does give the meaning of money)
Sorch's description of Q11 is more accurate.
17 I was given a suggestion of "Mutton Chops", good answer, but not exactly what I was looking for, think insects!

Nigel