Articulate European lacking expression for 'complete freedom' (5,6)
I believe the answer is:
blank cheque
'articulate european lacking' is the definition.
I can't judge whether this defines the answer.
'expression for complete freedom' is the wordplay.
'expression' becomes 'blank' (blank is a kind of expression).
'for' is a charade indicator (letters next to each other).
'complete freedom' becomes 'cheque' (I can't justify this - if you can you should give a lot more credence to this answer).
'blank'+'cheque'='BLANK CHEQUE'
Can you help me to learn more?
(Other definitions for blank cheque that I've seen before include "Unspecified payment - freedom of action" , "Unlimited freedom of action" , "Payment slip, amount unspecified" , "Freedom to do as you see fit" , "Complete freedom of action" .)