Clue: Type of TV? Third to last as name for reliability (5)
Answer: CALEB
Explanation: Type of TV? Third to last as name for reliability (5)
**CA**(b)**LE-B** ("type of TV" (cable) with it's *third* letter moved *to last*) 
*Caleb comes from the Hebrew for "dog" and signifies devotion to God, reliability and fidelity.