The phrase 'go at it' can be interpreted in many ways, but in this context it is referring to a situation where two or more people are engaging in a physical or verbal altercation. The crossword solutions for this phrase include 'TUSSLE', 'SCRAP', 'TANGLE', 'ARGUE', 'CLASH', and 'SPAR'. A TUSSLE is a physical fight between two or more people, while a SCRAP is a brief and often violent altercation. A TANGLE is a complicated or confused situation, and arguing is a verbal dispute between two or more people. Clashing is a similar concept to tussling, but it is usually used to describe a disagreement between two or more people. Sparring is a form of practice fighting, and asnailspace is a term used to describe a situation where two or more people are engaged in a heated argument.