1. What do the following words have in common?

JUNK
BEAN
BOOK
SHARP

2. What do the following name and phrases have in common?

RICH LITTLE
FRAT PARTIES
SHIELD LAW
BEAUTY ICONS

HINT #2:
It has to do with combining one or more letters from the beginning of each word with one or more letters from the end of each word.

Answers:

1. Each becomes a new word when followed by IE:

JUNKIE
BEANIE
BOOKIE
SHARPIE (permanent marker)

2. By combining the beginning and ending letters of the clue words - that is, the SIDES of the clue words, you get SIDE DISHES:

RICe littlE
FRat partIES
Shield LAW
BEAuty icoNS

Credits:
#1: NY Times Crossword
      May 1, 2012
      Zoe Wheeler and Aimee Lucido
#2: LA Times Crossword
       April 13, 2016
       C.C. Burnikel
       SIDESHOW