Question: Where does the stadium that held the 1938 Claxton Shield derive it's name?

Context paragraphs:
1963 Claxton Shield: The 1963 Claxton Shield was the 24th annual Claxton Shield, it was held at the Brisbane Cricket Ground and Bannister Park in Brisbane, Queensland.  The participants were South Australia, New South Wales, Victoria, Western Australia and Queensland.  The series was won by New South Wales claiming their ninth Shield title and first since the 1955 Claxton Shield.

1938 Claxton Shield: The 1938 Claxton Shield was the fifth annual Claxton Shield, an Australian national baseball tournament.  It was held at the WACA Ground and Subiaco Oval in Perth from 3 to 13 August, the first time Perth had hosted the Shield.  New South Wales won the Shield for the second time, successfully defending their title from the previous year.  Hosts Western Australia had their best finish, losing to New South Wales in the final to finish second overall.  The other participating teams were Victoria and South Australia.

List of Claxton Shield champions: The Claxton Shield was the premier baseball competition in Australia, first held in 1934 and last held in 2010.  The Claxton Shield is also the name of the trophy awarded to the champion team, and has also been awarded to winners of both the original Australian Baseball League (ABL) and the International Baseball League of Australia (IBLA).  The current version of the Australian Baseball League uses the Claxton Shield as its championship trophy in the same way as its predecessor of the same name did.

1953 Claxton Shield: The 1953 Claxton Shield was the 14th annual Claxton Shield, it was held at the Brisbane Exhibition Ground and Davies Park in Brisbane, Queensland from 11–19 July 1953.  It was the first Claxton Shield held in Queensland.  The participants were South Australia, New South Wales, Victoria and Queensland.  The Western Australia team, holders of the Shield, were unable to afford the costs to travel to Brisbane.  The series was won by New South Wales, their seventh Shield title.

1965 Claxton Shield: The 1965 Claxton Shield was the 26th annual Claxton Shield, it was held in Sydney.  The participants were South Australia, New South Wales, Victoria, Western Australia and Queensland.  Victoria won their 8th Claxton Shield title in poor weather conditions similar to that of the 1964 Shield.

WACA Ground: The WACA (formally the WACA Ground) is a sports stadium in Perth, Western Australia.  The stadium's name derives from the initials of its owners and operators, the Western Australian Cricket Association.

Victoria Aces: The Victoria Aces are an Australian baseball team who compete in the Claxton Shield Baseball Championship.  One of the founding teams of the Claxton Shield in 1934, they competed until 1988.  Thereafter the Claxton Shield was awarded to the winner of the Australian Baseball League until 2002.  In 1999 the Victoria Aces accepted an invitation to join the International Baseball League of Australia.  They competed in the League for two seasons (1999–2000 and 2002); after this point the Claxton Shield reverted to a competition similar to 1988.

Queensland Rams: Queensland Rams compete in the Claxton Shield Baseball Championship in Australia.  The Rams were one of the founding teams of the Claxton Shield in 1934 and competed as "Queensland" until 1988.  Between 1988 and 1999, the Claxton Shield was awarded to the winner of the Australian Baseball League.  In 1999, the Rams were invited to join the International Baseball League of Australia in which they competed for 2 seasons (1999-2000 and 2002).  After this point, the Claxton Shield reverted to a competition similar to that of 1988.

Claxton Shield: The Claxton Shield was the name of the premier baseball competition in Australia held between state-based teams, as well as the name of the trophy awarded to the champion team.  From the summer of 1989–90 until 2001–02, and again since 2010–11, the tournament was replaced by one of three other competitions: the original Australian Baseball League (ABL), the International Baseball League of Australia (IBLA), and since the 2010–11 season the new ABL.  Despite other competitions being held in place of the Claxton Shield, the physical trophy has remained the award for the winning teams.  Though city-based teams have competed for the Claxton Shield in some seasons, the name engraved on the shield is that of the winning state; for the 2010–11 ABL season won by the Perth Heat, "West Australia 2011" was engraved.

2010 Claxton Shield: The 2010 Claxton Shield was the 57th Claxton Shield tournament, the premier baseball competition in Australia, and was held from 6 November 2009 to 7 February 2010.  It was hailed as the precursor to the new Australian Baseball League that will start in the place of the Claxton Shield in late 2010 to early 2011.  The Victoria Aces defeated South Australia two games to nil in the championship series to win the tournament; this was the 22nd time the Claxton Shield had been awarded to a Victorian team.  The competition was sponsored by Domino's Pizza.

Supporting paragraphs: 1938 Claxton Shield WACA Ground
Answer: the Western Australian Cricket Association