postcard.co.uk   ----------------- Tuesday, December 22 , 2009 Puzzle by Robert A. Doll, edited by Will Shortz It seems that six entries have lost their S -- HOP STEWARD (17A. Attendant at a ‘50s dance?) derived from shop steward; ELF ESTEEM (22A. Personnel concern for Santa?), self-esteem; PIN DOCTOR (51A. Acupuncturist?),