Based on the clue 'a small crease in the skin of older folks', what is the answer?

What is referred to by 'a small citrus fruit'? Based on the clue 'a small college yet there are those who love it i...', what is the answer? Based on the clue 'a small commemorative tablet perhaps for that gunk...', what is the answer? Based on the clue 'a small cone shaped structure at the back of the s...', what is the answer? Based on the clue 'a small cucumber preserved in vinegar', what is the answer? Based on the clue 'a small cylinder of fur or cloth into which the ha...', what is the answer? Based on the clue 'a small demon or a mischievous child who might be ...', what is the answer? Based on the clue 'a small dim star proxima centauri is one', what is the answer?