Public speakers roast or confuse (7)
I believe the answer is:
orators
'public speakers' is the definition.
('orator' can be a synonym of 'public speaker')
'roast or confuse' is the wordplay.
'confuse' indicates an anagram.
'roast'+'or'='roastor'
'roastor' is an anagram of 'ORATORS'.
(Other definitions for orators that I've seen before include "Grand public speakers" , "Cicero and Churchill were" , "Eloquent public speakers" .)