Radical police passed English head's full condition (12)

'radical police passed english' is the definition.
I can't judge whether this definition defines the answer.

'head's full condition' is the wordplay.
I cannot really see how this works, but
'full' could be 'complete' (similar in meaning) and 'complete' is found in the answer.
'head' could be 'ness' (ness is a headland) and 'ness' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?