Speaker from Dartmoor, a Tory (6)
I believe the answer is:
orator
'speaker' is the definition.
(orator is a kind of speaker)
'from dartmoor a tory' is the wordplay.
'from' indicates the answer is hidden within the clue.
'ORATOR' is hidden in the letters of 'dartmoor a tory'.
(Other definitions for orator that I've seen before include "Formal speech maker" , "Rhetorician" , "I declaim" , "One making one across" , "A Rhetorical talker or speech-maker" .)