Bill has little money, resulting in stress (6)
I believe the answer is:
accent
'stress' is the definition.
('accent' can be a synonym of 'stress')
'bill has little money' is the wordplay.
'bill' becomes 'ac'.
'has' says to put letters next to each other.
'little money' becomes 'cent' (I've seen this before).
'ac'+'cent'='ACCENT'
'resulting in' is the link.
(Other definitions for accent that I've seen before include "feature of dialect?" , "eg Acute" , "Mark to modify letter" , "Local way of speaking or enunciation" , "Here's, maybe, a grave" .)