First performance (5)
'first performance' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for debut that I've seen before include "First attempt" , "First appearance, coming out" , "Beginning, first performance" , "where one began" , "Aurora" .)
'first performance' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for premiere that I've seen before include "First showing of play or film" , "Leading actress" , "Opening night" , "First screening" , "Leading lady" .)