It's Jumped on When Everyone Follows a Trend
This page is the CodyCross answer for the clue below from The 70's, Group 323, Puzzle 5 (Led Zeppelin).
Question is: It's Jumped on When Everyone Follows a Trend
and the answer is: BANDWAGON
Word Meaning:
BANDWAGON — A large wagon used to carry a band of musicians in a parade.
Definitions from Wiktionary.