The term 'To Have and To Hold' is a phrase commonly used in wedding ceremonies, where the couple exchange vows to remain together and to POSSESS each other. The crossword solutions for this term are 'POSSESS' (7 letters) and 'OWN' (3 letters). POSSESS means to have control over something, while OWN means to have something as one's OWN property. Together, these two words convey the idea of having and holding something, which is the essence of the phrase 'To Have and To Hold'.