### Clue: North America in shock after competitor gets through early round, needing power to stay up (7,4,3)
### Answer: HEAVIER THAN AIR 
 ### Explanation: Definition: needing power to stay up 
 [ NA(abbrev. for "North America") **contained in**(in) HAIR(which could be a thick bushy mass;a shock) ] **placed after**(after, in an across clue) [ VIER(one who vies;a competitor) **contained in**(gets through) HEAT(an early elimination round in a competition) ].