Does in accordance with documents to be filled up (8)
I believe the answer is:
performs
'does in accordance' is the definition.
'performs' can be an answer for 'does' ('perform' can be a synonym of 'do'). I am unsure of the 'in accordance' bit.
'documents to be filled up' is the wordplay.
'documents' becomes 'forms' (form is a kind of document).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'be filled up' becomes 'per' (I can't explain this - if you can you should give a lot more credence to this answer).
'forms' put after 'per' is 'PERFORMS'.
'with' is the link.
Can you help me to learn more?
(Other definitions for performs that I've seen before include "Carries out, acts" , "Acts as in play" , "Carries out, accomplishes" , "Carries into effect or functions" , "Acts or executes" .)