Crossword Genius

Ear complaint can fool American (8)

Ross

I believe the answer is:

tinnitus

'ear complaint' is the definition.

'can fool american' is the wordplay.
'can' becomes 'tin' ('tin' can be a synonym of 'can').
'fool' becomes 'nit' (I've seen this before).
'american' becomes 'us'.
'tin'+'nit'+'us'='TINNITUS'

(Other definitions for tinnitus that I've seen before include "Constant ringing noise in the ears" , "Sensation of ringing in the ears" , "Condition in which there is constant ringing in the ears" , "problem for audience" , "sensational complaint" .)

I've seen this clue in The Telegraph.
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