Listener's problem can fool American (8)
I believe the answer is:
tinnitus
'listener's problem' is the definition.
The definition suggests a singular noun which matches the answer.
'can fool american' is the wordplay.
'can' becomes 'tin' (both are metal containers).
'fool' becomes 'nit' (both can mean a stupid person).
'american' becomes 'US' (abbreviation for United States).
'tin'+'nit'+'us'='TINNITUS'
Can you help me to learn more?
(Other definitions for tinnitus that I've seen before include "Hearing ailment" , "Condition in which there is constant ringing in the ears" , "Sensation of ringing in the ears" , "sensational complaint" , "problem for audience" .)