### Clue: Energetically heads to celebration of City follower of note (3,4)
### Answer: CON BRIO 
 ### Explanation: Definition: Energetically
 **1st letters, respectively, of**(heads to) "celebration of " + [ RIO(de Janeiro, the Brazilian city) **placed below**(follower of, in a down clue) NB(abbrev. for "nota bene", Latin for "note well";take note) ].
Answer: Musical direction to play with energy;vigorously.