non-dealing clausenon-dealing clause: in the context of restrictive covenants ...: in the context of restrictive covenants in employment contracts, a contractual clause that seeks to restrict a former employee from dealing with customers and clients of their former employer, usually for a limited period of time following terminationtermination: in contract law, the cessation of the term of t... of their employment. Also found in other contracts such as consultancy agreements, share purchase agreements and business sale agreements.