
1) American cuisine 2) Cooking technique 3) Culinary terminology
Found on
https://www.crosswordclues.com/clue/engastration

Engastration is a method of cooking in which the cook stuffs the remains of one animal into another animal. The method supposedly originated during the Middle Ages. Among the dishes made using the method is Turducken, which involves placing chicken meat within a duck carcass within a turkey. The Turducken became popular after American football com...
Found on
http://en.wikipedia.org/wiki/Engastration

stuffing of one bird inside another
Found on
http://phrontistery.info/e.html
No exact match found.