Answer: addedon

AnswerCrossword Clue
ADDEDON

Attached

ADDEDON

Built a wing

ADDEDON

Expanded, in a way

ADDEDON
Appended
ADDEDON
Annexed
ADDEDONExtended
ADDEDONAttached later
ADDEDONBuilt a new wing
ADDEDONExtra
ADDEDONLike a postscript
ADDEDONPadded