Crossword Clue:

Placed so as not to be found

AnswerCrossword Clue
HIDPlaced so as not to be found
UNDERTHERADARSo as not to be noticed
ONTIPTOESo as not to be heard
SOTTOVOCESo as not to be overheard.
MUTEDSo as not to be overheard, say
LOSTNot to be found
HIDETry not to be found
AWOLNot to be found, for short
CUCKOOCLOCKSTimepieces not likely to be found in libraries