Answer:

addon

Answer	Crossword Clue
ADDON	Increase
ADDON	Append
ADDON	Supplemental component

ADDON	Extra-cost item
ADDON	Supplement
ADDON	Legislative rider, e.g.
ADDON	Extra charge
ADDON	Accessory
ADDON	Webcam, for example
ADDON	Computer accessory
ADDON	Extra

ADDON	Attach
ADDON	Home builder's afterthought
ADDON	Garage, perhaps
ADDON	Not standard
ADDON	Peripheral
ADDON	Something attached
ADDON	Attachment
ADDON	Enhancement

ADDON	Aftermarket item
ADDON	Bonus
ADDON	Extension
ADDON	Rider, e.g.
ADDON	Purchase of a Kickstarter backer who pledges above the minimum
ADDON	Annex
ADDON	Auto option, e.g.
ADDON	Building contractor's job

ADDON	Scanner, maybe
ADDON	Accompaniment
ADDON	Optional component
ADDON	Build an annex
ADDON	Surcharge, e.g.
ADDON	Something extra
ADDON	House extension
ADDON	Affix

ADDON	CD burner, e.g.
ADDON	Append.
ADDON	Attach.
ADDON	Enlarge.
ADDON	Knitting instruction.