Delighted about the ex-editor (6)
I believe the answer is:
elated
'delighted' is the definition.
(thesaurus)
'about the ex-editor' is the wordplay.
'about' indicates putting letters inside.
'the ex' becomes 'late' (I've seen this in other clues).
'editor' becomes 'ed'.
'late' placed into 'ed' is 'ELATED'.
(Other definitions for elated that I've seen before include "Ecstatically happy" , "In high spirits, very pleased" , "Jubilant, happy and excited" , "Filled with joy and pride" , "Feeling overjoyed and happy" .)