Delight oppressing a Conservative spilling secrets? (10)
I believe the answer is:
revelatory
'spilling secrets?' is the definition.
(I've seen this before)
'delight oppressing a conservative' is the wordplay.
'delight' becomes 'revel' (I've seen this before**).
'oppressing' is a charade indicator (letters next to each other).
'conservative' becomes 'tory' (I've seen this before).
'revel'+'a'+'tory'='REVELATORY'
(Other definitions for revelatory that I've seen before include "spilling the beans" , "Eye-opening" , "spilling secrets" , "like exposure" , "disclosure" .)