It's Rodent the first in an oil bloc found
A twitch that tags on to a story in sound
Like Wotan it turns an irate cop around.
It's a long span of time, in a visual way.
That is the word that I'm trying to say.
The answer is a single English word. There are five clues, all found in the first four lines. This is a cryptic crossword style puzzle. The clues are four ways to construct the word and a definition.