you hold KQJx of trump.
on your opening lead you tapped declarer, who you anticipate has at most 5 trump and at the same time established the suit led, AND kept an entry to p's hand.
declarer errs slightly by putting down the ace of trump and another . you know you can now pull ALL outstanding trump and let p run his winners.
what order do you play your trump honors to tell partner that they should keep their winners and don't need to hold their minor honor guard in another side suit? (partner followed in trump on the first trump trick, but you anticipate will have a discard on the second).
(for completeness, you are South, declarer is East).
also, another edit -- you know trump lie like this around the table: