Examples:

• They agreed to give her a leg up.
• Joining the Visa network would give it the leg-up it needs.
• With some of these suggestions, you're sure to have a leg-up on preparing and enjoying (and getting through!) the holidays.
• Attending a Catholic high school may also give you a leg up on affording college.
• Many of these will have "class" times, often held an hour or two before the formal dancing begins, giving you a leg up on the dance floor.
• These advances, in turn, will give us a leg up on the 'loose nukes' problem that rightly worries us all.
• If you are lucky enough to own your dog from puppyhood, you have a leg up on the rest of the dog world.
• Perhaps, this is the leg-up that Nintendo needs to grab a huge market share.