Related Clues:

• Non-permanent employee
• Vacation sub
• Berlin's were blue
• Office sub, perhaps
• Part-timer
• Air Force domain
• Casual worker
• N on-permanent worker
• Short employment contracts for me
• Non-permanent worker
• Transient office worker
• Helper at crunch time
• They can be clear and blue
• Hits a high fly, in baseball lingo
• 'Blue '