Answer:

shadow

AnswerCrossword Clue
SHADOWOld time radio fare: "The ...."
SHADOWSecretly follow
SHADOWDark patch
SHADOWPhantom
SHADOWSundial indicator
SHADOWBit of a doubt?
SHADOWOutline cast by the sun
SHADOWIt lengthens toward evening
SHADOWTail
SHADOWSilhouette
SHADOW"Me and My ..."
SHADOWPeter Pan's loss
SHADOWWhat Peter Pan lost
SHADOWLamont Cranston's alter ego, with "The"
SHADOWFollow covertly
SHADOWSundial casting
SHADOWIt grows toward evening
SHADOWFollow closely
SHADOWIndistinct image
SHADOWSundial's "moving part"
SHADOWFollow secretly
SHADOWGroundhog Day focus
SHADOWStay behind
SHADOWBird-dog
SHADOWPeter Pan loses his.
SHADOWOne type of boxing.
SHADOWConstant companion.
SHADOWPeter Pan's concern.
SHADOWInseparable companion.
SHADOWPeter Pan's loss.
SHADOWMan's double.
SHADOWUnit of doubt
SHADOWDo a sleuthing job
SHADOWR. L. Stevenson's companion
SHADOWOmniscient radio character
SHADOWFeb. 2 omen
SHADOWPenumbra
SHADOWFebruary 2 sighting
SHADOWFigure at one's side
SHADOWBoxer's sparring partner, at times