Related Clues:

• Back, as a candidate
• Speak in favor of
• Give support to
• Give one's backing
• Plug a product, e.g.
• Sign the back
• Approve, as a law
• Sign, in a way
• Formally support, as a candidate
• Give approval to
• Sign or support
• Corroborate
• Get behind, on the trail
• Confirm with a vote, e.g.
• Support, as a candidate