A decoy or deflection typically lure an opponent's piece away from a square. What is it called when you sacrifice in order to lure/force an opponent to a certain square in order to prevent another piece escaping?
A (pretty bad) example, Black rook D1, forces queen captures D1 which now allows queen F2 mate. The reason this is a bad example is because black doesn't actually need to squash the king in by luring a piece to D1, since that square is already covered by the rook on D8.
The key idea is that we want to squash the opponent's pieces around their king. (note that it's a bit like some smothered mates, but in this case not every square around the king is covered, hence not a perfect smothered mate).
The best term I can come up with is 'partial smothered mate'