Clue 55:
The clue is written as 55 (5)
.... so lots of FIVES in the clue!
Eton ----- is a hand-ball game, played in a three-sided court.
Clue 75:
The answer is a Victorian Parlour game-
Sly is the nickname of the actor Sylvester Stallone - known for two main roles .... Rocky and Rambo ...
Take one of these roles .... and put the letter C (circa) in front .... you now have your game!!
Clue 81:
Race as in people (6 letter word) .... sometmes Great Britain is called an Island N - T - - N
Put this word AROUND 'at' .... you now have an 8 letter answer that is an obscure word that means swimming (crawling is a reference to the swimming stroke, the crawl)