Customary observance is a term used to describe the practice of following certain traditions or rituals. It can refer to religious ceremonies, social customs, or other accepted practices. The two crossword solutions for this term are 'RITE' and 'RITUAL'. A RITE is a formal ceremony or set of actions that are performed in a specific way, often with religious or spiritual significance. A RITUAL is a series of actions or activities that are done in a particular order and with a specific purpose. Both rites and rituals are part of customary observance.