The term 'CLEARANCE RACK ABBR.' is an abbreviation for IRREGULAR and IRREGULARLY priced items. The two crossword solutions for this term are IRREG (5 letters) and IRR (3 letters). IRREG stands for 'IRREGULAR' and IRR stands for 'IRREGULARLY'. These terms refer to items that have been discounted or are being sold at a lower price than their original value. This could be due to the item being out of season, damaged, or simply overstocked. Clearance racks are often found in retail stores and are a great way to save money on items that may otherwise be too expensive.