Signs

16 clues
Marks
Omens
Traces
Signals
Vestiges
Warnings
Endorses
Evidence
Billboards
Harbingers
Autographs
Indications
Protest group?
Billboards, e.g.
Communicates in a way
Puts one's John Hancock on
Similar answers:
Aamesiowa
Aasifmandvi
Aasin
Aasinapple
Aasinare
Abasing
Abbashitsingle
Abcletelevision
Abernsteinmusical
Abesimpson
Abiesirish
Abiesirishroast
Abiesirishrose
Abitontheside
Abitsimple
Ablewasier
Abnersingleday
Abouthisize
Abpositive
Abrasing