acquaint advice advise alerting answer apprise basis for belief body of evidence broad hint catchword caution chain of evidence cue cue word data datum documentation evidence exhibit fact facts fill in gentle hint gesture glimmer glimmering grounds grounds for belief hint hot lead implication imply index indicate indication indicator inform information inkling innuendo insinuation intimate intimation item of evidence key key word kick lead look manifestation mark material grounds monition muniments mute witness nod notify notion nudge office passing word piece of evidence pointer post premises prompt proof reason to believe relevant fact scent sign signal spoor steer suggest suggestion suspicion symptom tell telltale tip tip-off token trace track vestige warn warning whiff whisper wind wink