Related Clues:

• Letters before a phone no., perhaps
• Promise attendance, briefly
• Don't just show up
• Initials on invitations
• Short answer?
• Job-seeker's need
• Abbr. on an invitation
• Use Evite
• Solution
• Question, on 'Jeopardy!'
• Letters from the host
• Exam-sheet entry
• Invitation abbreviation
• Answer an Evite
• Riposte