One ton carried by naked singer (8)
I believe the answer is:
baritone
'singer' is the definition.
(baritone is a kind of singer)
'one ton carried by naked' is the wordplay.
'one' becomes 'I' (Roman numeral).
'carried by' is an insertion indicator.
'naked' becomes 'bare' (synonyms).
'i'+'ton'='iton'
'iton' placed inside 'bare' is 'BARITONE'.
(Other definitions for baritone that I've seen before include "Adult male singing voice" , "Male voice between bass and tenor" , "Male singer between tenor and bass" , "Male voice with deep register" , "One who can sing" .)