From cue + sport.
cuesport (plural cuesports)
- (rare) Alternative spelling of cue sport
1996 June 7, Carl M. Pearson, “Re: 'Color of Moan-ey'”, in rec.sport.billiard[1] (Usenet):Their false mannerisms fell away and they settled down to the skill/science/mindset/practise of their cuesport.
2002 December 26, Jason Batley, “Are US citizens unable to play any cuesport?”, in rec.sport.billiard[2] (Usenet):Snooker is the ultimate cuesport, with even minor professionals earning hundreds of thousands.
2003 November 4, Austin K. Williams, “Re: Disagreement ...”, in alt.sport.snooker[3] (Usenet):[…] snooker has, at best, a grim future. Too bad, greatest cuesport ever.
2004 March 18, Tjander Nathoeni, “Re: Man ... this place”, in alt.sport.pool[4] (Usenet):Ofcourse[sic] the top players in whatever cuesport are the best cueist there are and the best poolplayers normally play their shots clean but still...
2006 August 25, John Black, “Re: Some thoughts on KoH Final”, in rec.sport.billiard[5] (Usenet):Ok, so now the only question is: is there any cuesport he's not great at?
The form cue sport is much more common.