
1) English poem 2) French girl name 3) One-act opera 4) Opera by André Grétry 
Found on 
https://www.crosswordclues.com/clue/lucile
 [opera]
[opera]  ==Performance history== It was first performed at the Comédie-Italienne, Paris on 5 January 1769. ==Roles== ==Selected recordings== Lucile by David Charlton, in `The New Grove Dictionary of Opera`, ed. Stanley Sadie (London, 1992) ISBN 0-333-73432-7 ...
Found on 
http://en.wikipedia.org/wiki/Lucile_(opera)

Lucile is a French name for girls. The meaning is `the bright, born at daybreak` The name Lucile is most commonly given to French girls. The chances are 50 times greater that girls are called Lucile there. What do they use in other countries? Luus (Dutch) The name sounds like: Lusile, Lucyle, Lucila Similar names are: Lucine, Lucie See also: Lucia
Found on 
https://www.pregnology.com/names/girls/Lucile
  No exact match found.