Stir together mayonnaise, mustard, Worcestershire, lemon zest and juice, hot sauce, smoked paprika, garlic powder, salt, and pepper in a large bowl until combined.
Add ham cubes to a food processor bowl, and pulse until chopped, about 5 (1-second) pulses.
Add scallion, celery, and dill to processor bowl, and pulse until finely chopped, about 10 (1-second) pulses.
Transfer ham mixture to mayonnaise mixture, and stir until well combined.
Transfer to a serving bowl, and garnish with additional celery leaves and dill. Serve with crackers or toasted baguette slices.
