Possible Clues:

• Next to
• Next to, another boat say
• It¿s dragged out after Mark reached Leinster at the same time
• Next to a hypotenuse?
• Bordering a hypotenuse?
• 'Next at sea, but not edge shortly (9)'
• In cooperation with a spun out cricket team?
• Next to, another boat perhaps
• Next
• Close to a hypotenuse?