As worn by a master chef initially? (3)
I believe the answer is:
mac
'as' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'worn by a master chef initially?' is the wordplay.
'worn by' is an insertion indicator.
'initially?' suggests taking the first letters (I've seen 'initially' mean this).
The initial letters of 'master chef' is 'mc'.
'a' going inside 'mc' is 'MAC'.
Can you help me to learn more?
(Other definitions for mac that I've seen before include "Waterproof raincoat, in short" , "Coat - computer" , "one used in shower?" , "Overcoat" , "It may help you keep dry" .)