Related Clues:

• To be of use to
• Take unfair advantage of
• Canadian pop singer Lavigne
• ''... but to no ___''
• Heroic feat
• To no __ (ineffective)
• ''...but to no ___''
• Meet the need
• To no --
• Have efficacy
• To no __ (unsuccessful)
• Serve a purpose
• Be helpful to
• Prove useful to
• Adventure