Answer: addl

AnswerCrossword Clue
ADDLExtra (abbr.)
ADDLNot included: Abbr.
ADDLExtra: Abbr.
ADDLExtra, in ads
ADDLTacked on: Abbr.
ADDLMore: Abbr.
ADDLFor an extra cost: Abbr.
ADDLSupplementary: Abbr.
ADDLLike shipping and handling, typically: Abbr.
ADDLNot incl.
ADDLBonus: Abbr.