Suggest everyone due for sacking (6)
I believe the answer is:
allude
'suggest' is the definition.
(thesaurus)
'everyone due for sacking' is the wordplay.
I cannot quite understand how this works, but
'everyone' could be 'all' (all people) and 'all' is present in the answer.
an anagram of 'due' is 'ude' which is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for allude that I've seen before include "Make reference to, perhaps indirectly" , "Refer obliquely" , "advert" , "Mention; imply" , "Speak about in passing" .)