The term 'not on a tilt' is a phrase used to describe a situation in which someone is not in an agitated or excited state. It is often used to describe a person who is calm and composed, and not easily provoked. The crossword solutions for this term are LEVEL, which is a five-letter word. LEVEL can be used to describe a surface that is even and flat, and it can also be used to describe a person's emotional state. In this context, it implies that the person is not in an agitated or excited state, but rather is calm and composed.