The definition is Pearl's place?, and the question mark flags a bit of cheek, since a pearl turns up inside an oyster. For the wordplay, take every other letter of "Priests say God" (the 2nd, 4th, 6th and so on), which gives R-E-T-S-Y-O. Then "turned up" tells you to reverse it, because this is a down clue, and out pops the answer.