Suddenly, through the fog of drunkenness that clouded Ghost's brain, suspicion flared.

A dim suspicion had flared in his brain.

He'd felt her instinctive withdrawal, and a sudden suspicion flared in his tequila-fogged brain.

The response immediately caused M'k'n'zy's suspicions to flare.

His suspicion flared into hot dread.

His suspicions, allayed for a moment, flared anew.

Renewed suspicion flared in her eyes.

He realized Damson was studying him, a hard, probing look, and without warning his suspicions flared anew.

My suspicions flared again, higher than ever, helping me to make up my mind on exactly what I wanted to do.

Vague, unfocussed suspicion flared, brought on more by a naturally cynical nature than by any untoward events.