Privileged classes devoid of good record (5)
I believe the answer is:
entry
'record' is the definition.
(entry is a kind of record)
'privileged classes devoid of good' is the wordplay.
'privileged classes' becomes 'gentry' (I've seen this before).
'devoid of' suggests deleting specific letters.
'good' becomes 'g' (abbreviation).
'gentry' with 'g' taken out is 'ENTRY'.
(Other definitions for entry that I've seen before include "Admission" , "Item inserted in a written record" , "Doorway" , "all runners" , "field" .)