Clue: Guy's partner, one meeting DiCaprio? The earth moved for him! (7)
Answer: GALILEO
Explanation: Definition: The earth moved for him!

**GAL** ("guy's partner") + **I** (one) + **LEO**(nardo) (DiCaprio)
 
*Galileo famously angered the church by postulating that Earth moved around the Sun, rather than the establishment's view that the Sun moved around Earth.