Daddy Don't Live In That New York City No More Lyrics

Lyric discussion by AlanB 

Cover art for Daddy Don't Live In That New York City No More lyrics by Steely Dan

I believe "The piece he keeps out on Avenue D" to be a reference to a gun

@AlanB Yes.

@AlanB More inclined to believe his "piece" is Lucy. Not needing a lock and key for her makes a lot more sense, as does keeping her some distance from his house (unlike a gun).