Angry viewer has strabismus (5-3)
I believe the answer is:
cross-eye
'strabismus' is the definition.
(I know that cross-eye is a type of strabismus)
'angry viewer' is the wordplay.
'angry' becomes 'cross' (cross can mean annoyed or angry).
'viewer' becomes 'eye' (organ which sees or views).
'cross'+'eye'='CROSS-EYE'
'has' is the link.
I've seen this clue in The Independent.
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