Revise legal document in Early English, putting King foremost (7)
I believe the answer is:
rewrite
'revise' is the definition.
(I know that revise is a more specific form of the action rewrite)
'legal document in early english putting king foremost' is the wordplay.
I cannot really see how this works, but
'document' could be 'writ' (writ is a kind of document) and 'writ' is found in the answer.
'english' could be 'e' (abbreviation) and 'e' is found within the answer.
'king' could be 'r' (abbreviation for rex, king in Latin) and 'r' is present in the answer.
A single letter 'e' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for rewrite that I've seen before include "New version of work" , "Revise" , "Produce new draft" , "Redraft" , "Completely change (script)" .)