Historical clue formulations

• Half a wolf's cry — 2012-02-28
• When doubled, "I like!" — 2010-08-01
• When repeated, a luster's cry — 2010-01-03
• When doubled, a wolf's call — 2009-05-27
• When repeated, an ogler's cry — 2006-05-30
• When repeated, a cry of approval — 2004-07-21
• When repeated, an old-fashioned cry — 1998-05-17