1A: def: "four weeks a year". wordplay: BE A FURRY anagrammed ("about")
6A: def: "like Supreme Court justices". wordplay: ROB ("steal from") + ED ("education")
7A: def: "tech used in 1917" (the movie). wordplay: C ("Country's top") + GI ("soldier")
8A: def: "setting for the departed". wordplay: AF ("inside of cAFe") + FERTILE anagrammed ("ground")
10A: an &lit! wordplay: Reverse Hidden Answer ("twisted... on the inside") within "strANDs"
11A: def: " or ". wordplay: IJOKE reversed ("about") then replace the K with M ("turning $1,000 into $1,000,000")
13A: def: "jumbles". wordplay: REcORDERS ("archivists") with the C gone ("ignoring copyright")
1D: def: "straight". wordplay: homophone ("that, when uttered") of FOUR WORDS
2D: double def: me (Bob) and the haircut ("do")
3D: def: "lingerie". wordplay: UN + DER ("Articles in Le Monde and Die Welt", i.e. 'A' in French and 'THE' in German) + WAR containing ("during WAR") E ("everyone" ... from the common video game rating "E for Everyone")
4D: def: "5 star Lake" (since 5-Down is NINETIES, this makes the def "Nineties star Lake" ). wordplay: contained in RI ("rhode island") is ICK ("gross")
5D: def: "when I was a kid" . wordplay: EINSTEIN anagrammed ("slapped")
9D: def: "carpentry for one". wordplay: a reverse letter bank ("uses each part of") from DEAD TREE
12D: def: "I" (as in the roman numeral). wordplay: homophone (indicated by the quote marks ) of WON
Hehe hello! for full transparency: I was born in the 80s, but grew up in the 90s. Not sure if that's your situation too... I just don't wanna steal any valor!