Irritable heads of TV entertainment taking care hiring youths (6)
I believe the answer is:
tetchy
'irritable' is the definition.
(I know that irritable can be written as tetchy)
'heads of tv entertainment taking care hiring youths' is the wordplay.
'heads of' suggests taking the first letters.
The first letters of 'tv entertainment taking care hiring youths' is 'TETCHY'.
(Other definitions for tetchy that I've seen before include "Informally irritable" , "Bad-tempered" , "Easily irritated or annoyed, narky" , "Irritable, cross" , "Cantankerous" .)