telltale
[noun]
Synonyms: gossip, carrytale, clack, gossiper, gossipmonger, newsmonger, quidnunc, scandalmonger, tabby, talebearer, hint, clue, cue, indication, inkling, intimation, notion, suggestion, wind

[TahlilGaran] English Synonym Dictionary ▲

I. tell‧tale¹ /ˈtelteɪl/ adjective
telltale signs/marks etc signs etc that clearly show something has happened or exists, often something that is a secret:
They examined the child carefully, looking for telltale signs of abuse.

[TahlilGaran] Dictionary of Contemporary English ▲

II. telltale² noun [countable] British English
a child who tells adults about other children’s secrets or bad behaviour – used by children to show disapproval Synonym : tattletale American English

[TahlilGaran] Dictionary of Contemporary English ▲