faint, slight, small, tiny
She caught the faintest flicker of amusement on his face.

brief
sudden
last (often figurative)
The police stamped out the last flickers of freedom.

candle

show
catch, notice, see
detect, feel
She felt a brief flicker of jealousy.

cross sth
A flicker of guilt crossed his face.

catch sb's eye
A flicker of movement caught her eye.

flicker of
‘He'll soon be here,’ she thought, with a flicker of excitement.
She spoke without a flicker of fear.

the flicker of a candle, the flicker of a flame
The brief flicker of a candle flame caught our eyes.

a flicker of sb's/the eyes
Her only reaction was a slight flicker of her eyes.

a flicker of hope, a flicker of interest
Stock markets showed barely a flicker of interest in the election result.

a flicker of light, a flicker of movement
He saw a flicker of light in the darkness.

a flicker of recognition
The witness stared at the accused but she showed not a flicker of recognition.

a flicker of a smile
I noticed a flicker of a smile on her face.

briefly, for a moment, momentarily
slightly
nervously
Her eyes flickered nervously in anticipation.

rapidly
off, out
on and off
The lights flickered on and off.

across, over
His gaze flickered over her.

flicker into life, flicker to life
The television screen flickered into life.

flicker open
Kate's eyes flickered open.

Flicker is used with these nouns as the subject:
bulb, candle, eye, fire, flame, gaze, image, lamp, light, monitor, screen, shadow, smile, tongue, torch