Stress bill just a small amount of money (6)
I believe the answer is:
accent
'stress' is the definition.
(accent can mean to emphasise or stress)
'bill just a small amount of money' is the wordplay.
'bill just' becomes 'ac' (short for account. I am not sure about the 'just' bit.).
'a small amount of money' becomes 'cent' (coin of little value).
'ac'+'cent'='ACCENT'
Can you help me to learn more?
(Other definitions for accent that I've seen before include "Distinctive way of pronouncing language" , "Tone of voice" , "Distinctive local way of speaking" , "Underline" , "Mark over a vowel, perhaps" .)