Stack undying under persist so that persist resolves first and
Puppeteer Clique ETBs.
Resolve the
Puppeteer Clique ETB, reanimating a creature from an opponent's graveyard, then allow the undying trigger to fail to resolve and the scry 1 to resolve.
Sacrifice
Puppeteer Clique to
Viscera Seer, putting scry 1 onto the stack.
Undying and persist go on the stack.
Stack persist under undying so that undying resolves first and
Puppeteer Clique ETBs.
Resolve the
Puppeteer Clique ETB, reanimating a creature from an opponent's graveyard, then allow the persist trigger to fail to resolve and the scry 1 to resolve.