Aaron Finch then top-edged a Best bouncer to Sunil Narine at fine leg on the boundary in the third over for just one run.
Shaun Marsh, in for Clarke, found the first boundary in the fifth over.
But Best and Sammy were restricting Australia, bowling the new ball at speeds peaking over 150 kilometres per hour (93 mph).
Phillip Hughes faced 19 balls before he got a run but patiently built a partnership of 61 with Marsh before D.J Bravo had him caught for 29 off 61 balls.
Pollard took the freak leaping catch at backward point, knocking the ball into the air with an outstretched left hand and holding it easily at second bite.
Keeper Devon Thomas made no mistake in snapping up Shaun Marsh, who had reached 40 off 58 balls and was looking set at the start of the 25th over. It was Dwayne Bravo's 150th ODI wicket. (AFP) CM
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