Blame Charlie, you can be certain (7)
I believe the answer is:
censure
'blame' is the definition.
(I've seen this before)
'charlie you can be certain' is the wordplay.
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'you can' becomes 'en' (I can't explain this - if you can you should give a lot more credence to this answer).
'be certain' becomes 'sure' ('sure' can be a synonym of 'certain').
'c'+'en'+'sure'='CENSURE'
Can you help me to learn more?
(Other definitions for censure that I've seen before include "Harsh criticism or disapproval" , "Rebuke, strongly criticise" , "Rebuke formally" , "Reproof - blame" , "Carpet" .)