Answer:

subplot

Answer	Crossword Clue
SUBPLOT	Secondary thread
SUBPLOT	Story within a story
SUBPLOT	Novel nuance

SUBPLOT	Side story
SUBPLOT	Condensed book's lack, maybe
SUBPLOT	Dramatic side story
SUBPLOT	Soap opera feature
SUBPLOT	It's not the main story

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.