Does it mean "step/strategy"? I used this link: http://www.oxfordlearnersdictionaries.com/definition/english/play_2
"GIC Pte, the Swiss bank's largest shareholder, said on Tuesday that it was paring its 5.1 percent stake to 2.7 percent. When GIC announced in December 2007 that it would buy UBS convertible bonds for 11 billion Swiss francs -- roughly $10 billion at the time -- the bank had just written down U.S. subprime investments by an equal amount. GIC thought UBS was ahead of the curve in recognizing subprime losses, and a long-term interest would be a good play on the "high growth potential" for wealth management in Asia."