In 18, the 'rule-keeper' is a small word, a man with a whistle!
27 Just an Irish name. A six-letter word for 'collapsed', destroyed. drop the second half.
20 Who'd give up, wouldn't eat, tripe and trotters?
8. I couldn't parse this properly. The definition is 'book' as a verb, used in copshops! Your L is wrong.