Manxman, eg, I defame in speech? (8)
I believe the answer is:
islander
'manxman eg' is the definition.
(I know that Manxman is a type of islander)
'i defame in speech?' is the wordplay.
'defame in speech?' becomes 'slander' (to slander someone is to defame them in speech).
'i'+'slander'='ISLANDER'
(Other definitions for islander that I've seen before include "Corsican, for example" , "Inhabitant of Fiji, for example" , "Man of Aran, say" , "one from Jersey, perhaps" , "Perhaps Sardinian" .)