Clue: Where, surprisingly, I find song with three words (4,2,2)
Answer: HERE WE GO
Explanation: Definition: song with three words
A charade of HEREW, an anagram ('surprisingly') of 'where' plus EGO ('I'). The definition refers to the consisting of the words "Here we go" sung repeatedly, to the tune of Sousa's *The Stars and Stripes Forever*.