Related Clues:

• Walk back and forth
• Speed
• Prisoners do it
• Ump's call
• Distance unit in duels
• Stride
• See 32-Across
• It might need to be picked up
• Exhibit nervousness
• It's set by a runner
• Something cons do
• Life partner
• Go to and fro
• Test proctor's call
• Act the expectant father