Document deleted from start to finish! (4)
I believe the answer is:
deed
'document' is the definition.
(I have seen 'legal document' mean 'deed' so perhaps 'document' could also mean 'deed')
'deleted from start to finish' is the wordplay.
'deleted from' becomes 'dee' (I can't explain this - if you can you should give a lot more credence to this answer).
'start' means to remove the last letter (I've seen 'starts' mean this).
'to finish' becomes 'do'.
'do' with its last letter removed is 'd'.
'dee'+'d'='DEED'
Can you help me to learn more?
(Other definitions for deed that I've seen before include "Legal document for transfer of property" , "Something done" , "Act - exploit - legal document" , "Feat" , "What's done" .)