1) American indie rock group 2) Anagram for re-enlist 3) Attender 4) Audience member 5) Auditor 6) Beholder 7) Concert attendee 8) Eavesdropper 9) Hearer 10) Observer 11) One in the npr audience 12) Perceiver 13) Person giving ear 14) SiriusXM subscriber 15) Talk radio fan Found on https://www.crosswordclues.com/clue/listener