Allow to get in the way of the game (8)
I believe the answer is:
roulette
'the game' is the definition.
(roulette is a kind of game)
'allow to get in the way' is the wordplay.
'allow' becomes 'let' ('let' can be a synonym of 'allow').
'to get in' is an insertion indicator.
'the way' becomes 'route' (route is a kind of way).
'let' put into 'route' is 'ROULETTE'.
'of' acts as a link.
(Other definitions for roulette that I've seen before include "Spinning-wheel game" , "Gambling activity" , "French gambling" , "Gambling device" , "Gambling game with spinning wheel and ball" .)