** Casino operator Wynn Macau falls 4% to HK$5.98, its lowest since Oct. 18

** Stock set for biggest one-day pct decline since Oct. 13

** Wynn Macau's parent Wynn Resorts posts Q3 profit and rev below Street expectations on sluggish casino business in Las Vegas

** WYNN's total Q3 rev at $1.69 bln vs analysts' avg estimate of $1.73 bln - LSEG

** Of which, rev from Wynn Macau's ops up 6.3% to $871.7 mln

** Citi maintains "buy" on Wynn Macau, but trims TP to HK$8.30 from HK$8.60, saying Q3 results came in as a slight miss and non-gaming rev, particularly retail, was underwhelming

** Rivals Sands China and MGM China shed 0.5% and 1.6%, respectively

** Galaxy Entertainment rises 1.3%, SJM adds 1.1% and Melco International climbs 0.2%

** Wynn Macau down 3.1% YTD

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))