Related Clues:

• Certain sub
• Seasonal employee
• Worker for a few weeks
• Workplace sub
• Day-to-day worker, briefly
• Help for a while
• Crunch-time helper
• Sidewalk Santa, e.g.
• Fill-in at the office
• ER stat
• Agency employee
• Crunch time call-in
• Interim office worker (Abbr.)
• Intern, perhaps
• It may be measured in F. or C.