The term 'Welcome at the Door' can be broken down into three crossword solutions: GREET (5 letters), Askin (5 letters), and Seein (5 letters). GREET means to say hello or welcome someone, Askin means to inquire or ask a question, and Seein means to observe or look at something. Together, these three words form a phrase that implies welcoming someone at the door by saying hello, asking questions, and observing them.