The term 'Tie In (To)' can be summarized as relating or connecting two things. This is often done in order to create a stronger bond between the two items, or to make them more relevant to each other. The crossword solution for this term is 'RELATE' which means to make a connection between two things. This connection can be made through similarities, shared experiences, or even through physical connections. By tying two things together, it can help to create a stronger bond and make them more relevant to each other.