Added (on)

TACKED

Think of how a sailor might temporarily attach something to a line, or how a notice might be fastened to a board.

"Added (on)" hints at attaching something extra, and "tacked" fits perfectly—it means to add or append, like tacking a note onto a message. The "on" in parentheses reinforces the idea of attaching, since "tacked on" is a common phrase for adding something at the end. The wordplay is straightforward, using the literal meaning of "tacked" as both a verb for fastening and a casual way to say "added."