You should hire that legal beagle to help with your contract.
legal beagle
idiomA lawyer, specifically one regarded as astute and skilful.
Origin
disputed originFrom legal + beagle. Beagle was probably chosen for the rhyme and because beagles were traditionally used for hunting hares or rabbits, due to their keen sense of smell and tracking instinct. Compare legal eagle.
When the company faced a difficult lawsuit, they hired a top legal beagle to represent them in court.
The firm assigned their most formidable legal beagle to the case, ensuring that every complex regulation was navigated with absolute precision.