Argument against leads to stress, we hear (10)
I believe the answer is:
contention
'argument' is the definition.
(synonyms)
'against leads to stress we hear' is the wordplay.
I cannot really see how this works, but
'against' could be 'on' (I've seen this in other clues) and 'on' is found within the answer.
'we hear' could be 'e' (I've seen this in other clues) and 'e' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for contention that I've seen before include "heated argument" , "Judgment" .)