Confront with the bill the price has been added to (6)
I believe the answer is:
accost
'confront' is the definition.
(I've seen this in another clue)
'the bill the price has been added to' is the wordplay.
I cannot quite see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
'bill' could be 'acc' and 'acc' is found within the answer.
The remaining letters 'os' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'with' is the link.
Can you help me to learn more?
(Other definitions for accost that I've seen before include "Approach boldly or insolently" , "Approach, stop and speak to" , "approach with menaces" , "Stop and pester" , "Buttonhole" .)