Write

15 clues
Pen
Draft
Record
Compose
Put down
Jot down
Set down
Dash off
Take down
Correspond
Drop a line?
Form letters
Parting request
Work on a script
Communicate by letter
Similar answers:
Aaronites
Abite
Abovethefruitedplain
Acapiteadcalcem
Accipiter
Accredited
Achondrite
Aconite
Aconites
Acrushofwrestlers
Actionitem
Actionitems
Actofpoliteness
Actpolitely
Actslikehesquitecrazy
Adamite
Adamites
Adefinitereason
Adlitem
Administerrites