Possible Clues:

• Make huge efforts
• Devote real energy (to)
• Struggle when river invades Cornish town endlessly
• Work hard to loosen rivets
• Shoot (for)
• Do all one can for school tour starting on Shannon shortly
• Word from Old French for ''compete''
• Do all one can with small square leading to most of the waterway
• Make an effort for holy man to find river without Russian leader
• Work hard