William Rufus Clyde Stewart (27 September 1893 – 23 April 1964) was an Australian professional golfer.

Stewart was born in Alberton, South Australia but when he was young the family moved to Seaton.

A 36-hole event for professionals was held on the day before the Open started, Stewart finishing second behind Dan Soutar.

[11][12][13][14] He also reached the final of the professional tournament played after the 1923 Open, losing to Fred Popplewell.

[15] In 1924 he qualified as the South Australian representative in the Sun Tournament in Sydney, although he lost to Walter Clark in the first round.

[20] Later in the year he won the inaugural South Australian Professional Championship, 5 strokes ahead of Fergus McMahon.

[25] After travelling to the United States, he played in the 1928 U.S. Open at Olympia Fields near Chicago, scoring 80 and 83 and missing the cut.

He then competed in the Mid-American Open at Lakewood Golf Club in Kansas City at the end of June, finishing in 13th place, and returned to Australia in mid-August.

[31] He made a bad start in the Australian Open at Royal Adelaide, but recovered to finish joint runner-up behind Ivo Whitton, as he had been in 1926.

[32] The following week he won the Australian Professional Championship beating Ernie Bissett 8&7 in the final.

[37] He won the South Australian 72-hole qualifying stage at Kooyonga in late-February by 15 strokes with a score of 287.

[38] The final stage was at Victoria Golf Club in mid-March with the five state winners competing over 72 holes.

[42] As in 1928, Stewart successfully qualified for the Open Championship and made the cut, finishing with a score of 315, in a tie for 47th place.

[46][47] In 1934 he was selected as one of the six-man Australian team to play the United States in the inaugural Lakes International Cup.