Crossword puzzle clue "they used to be together"

They used to be together

Put together together

They're made after they've been used

"The ___ and Alize keep me pissy / Girls used to diss me / Now they write letters 'cause they miss me" (Notorious B.I.G. lyric name-checking his fancy champagne diet)

Letters the Bluths put on the invitation to a fundraiser they couldn't think of a good cause for, which eventually became the fake disease they used to pocket all the donation money, on "Arrested Deve

Stick together — substance used by a builder

Pegs used for holding two parts of a structure together

Fastener used to hold girders together