Answer:

develops

Answer	Crossword Clue
DEVELOPS	Grows steadily
DEVELOPS	Works in a darkroom
DEVELOPS	Becomes apparent.

DEVELOPS	Evolves.
DEVELOPS	Does darkroom work
DEVELOPS	Evolves
DEVELOPS	Unfolds
DEVELOPS	Strengthens as muscles

Crossword

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