Old governor in whom rested blame (6)
I believe the answer is:
satrap
'old governor' is the definition.
(I've seen this before)
'rested blame' is the wordplay.
'rested' becomes 'sat' (to sit is to rest).
'blame' becomes 'rap' (synonyms).
'sat'+'rap'='SATRAP'
'in whom' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for satrap that I've seen before include "Persian provincial governor" , "Raps at the governor in ancient Persia" , "local ruler" , "Old Persian governor took a seat to start" , "Persian governor of old; small-time dictator" .)