Hi, rrrobbo,
For 14, Slough is pronounced “sluff”. You need a five-letter word meaning twine as a verb, and a common four-letter word for a cigarette paper.
For the first answer in 15, you are looking for a generic colloquial word for a first year student in North America. In the U.K., we would probably use a seven-letter word for such a student The first five letters of this word will give a synonym for cheeky, and then change the middle letter to an O.