trace (n)
suggestion (n)
hint (n)

Definition: a just detectable amount
Example: he speaks French with a trace of an accent.

suggest (v)
hint (v)

Definition: drop a hint

hint (n)
clue (n)

Definition: a slight indication

intimation (n)
hint (n)
breath (n)

Definition: an indirect suggestion
Example: not a breath of scandal ever touched her.

wind (n)
tip (n)
steer (n)
lead (n)
hint (n)
confidential information (n)

Definition: an indication of potential opportunity
Example: he got a tip on the stock market. a good lead for a job.

hint (n)
jot (n)
mite (n)
pinch (n)
soupcon (n)
speck (n)
tinge (n)
touch (n)

Definition: a slight but appreciable amount
Example: this dish could use a touch of garlic.