Possible Clues:

• Bottom-of-page abbr.
• Letters on the bottom of a letter, perhaps
• End-of-page abbr
• Compensated break from work: Abbr
• Benefit that may be rolled over: Abbr
• Workplace benefit, briefly
• Bankable vacation hrs., in some workplaces
• ''See other side'': Abbr
• Vacay days
• Please give a turn to the pot that's broken