Period Each Day When TV Viewing Is at Its Peak

Puzzle 4 of Same Letter at Both Ends Easy Pack

Question is: Period Each Day When TV Viewing Is at Its Peak

and the answer is: PRIMETIME

Word Meaning:

PRIME TIME — (television, radio) The block of programming on television during the middle of the evening, usually between 7:00 pm and 11:00 pm.

Definitions from Wiktionary.