Related Clues:

• Answer quietly in trust
• Please reply (abbrev.)
• Answer! (Fr.)
• Reply, please
• Depend on accepting copper's answer
• Kindly answer!
• Inviter's request
• Party giver's abbr
• Post to a host
• Invitee's obligation, briefly
• Letters sometimes seen before a phone no
• Initial request for an answer?
• Host-to-be's request
• Be a polite invitee
• ''Save the date'' follow-up