Related Clues:

• One way to build interest?
• Time in the service
• Assigned period of work
• Be parsimonious
• Work shift
• Closer's stat
• Conserve
• Eschew extravagance
• File, for instance
• Penny-pinch
• File menu option
• Put in an album, say
• Really economize
• Stretch of time
• Piece of work found in this puzzle's longer entries