Related Clues:

• Not valid, empty space
• Yours truly is given second note
• One receiving money
• Note, message
• I'll get ready - OK to enter gym?
• Vacant; not valid
• Communication from some moaner
• One wearing very old dress, originally, in absence of a suit
• Contents of some more diplomatic communication?
• Brief note
• Edit Ovid? There's nothing in it
• Note has to be followed by a second note
• Receiver of a cheque
• Your author takes little time to produce a note
• The writer's second reminder