First appearance (5)
'first appearance' is the definition.
(synonyms)
This is all the clue.
(Other definitions for debut that I've seen before include "First appearance in society" , "Initial appearance" , "First attempt" , "Start -- launch" , "where one began" .)
'first appearance' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for onset that I've seen before include "Stone (anag)" , "Initial stage; attack" , "Appearance of" , "Start, beginning" , "Assault; beginning" .)