Left some legal document around (8)
I believe the answer is:
departed
'left' is the definition.
(departing is a kind of leaving)
'some legal document around' is the wordplay.
'some' becomes 'part' (only part of something).
'legal document' becomes 'deed' (deed is a kind of legal document).
'around' indicates putting letters inside.
'part' placed into 'deed' is 'DEPARTED'.
(Other definitions for departed that I've seen before include "Left, went away" , "Quit" , "completely breathless" , "Left -- late" , "Gone, maybe dead" .)