Possible Clues:

• In brief, notation for last month
• This ad would not be for the young
• May be like this, in short, for June
• Abbreviation in correspondence for last month
• One short month ago
• In brief, last month in correspondence
• Last in a series: Abbr.
• How you get left shortly a month ago
• Shortly, that'll last a month, perhaps
• How you got to the left a month ago, in short