Possible Clues:

• In course taken initially, study very little
• Tiny trace
• Slight-but-appreciable addition
• Picked up positive reply about broth from waiter's hint
• Suspicion leads to short outburst in court by criminal
• Lag behind starter in dash
• Small taste or, pronounced aloud, a hint to this puzzle's theme
• Smidgen
• Hint of fraud connected with starter
• A little something to sip before study