Answer:

SMOLDER

Answer	Crossword Clue
SMOLDER	Burn below the surface
SMOLDER	Do a slow burn
SMOLDER	Burn without flames

SMOLDER	Burn slowly
SMOLDER	Feel suppressed anger
SMOLDER	Exist in latent state.
SMOLDER	Manifest suppressed anger.
SMOLDER	Burn smokily.
SMOLDER	Burn without flame.
SMOLDER	Burn without flame
SMOLDER	Show suppressed anger

SMOLDER	Seethe
SMOLDER	Burn without a flame
SMOLDER	Not quite catch fire
SMOLDER	Smoke a little
SMOLDER	Barely contain one's anger
SMOLDER	Seethe with rage
SMOLDER	Combust slowly
SMOLDER	Barely contain anger

Crossword

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