Left some paper for investments (9)
I believe the answer is:
portfolio
'for investments' is the definition.
(I've seen this before)
'left some paper' is the wordplay.
'left' becomes 'port' (left side of a ship - opposite of starboard).
'some paper' becomes 'folio' (folio is a kind of paper).
'port'+'folio'='PORTFOLIO'
(Other definitions for portfolio that I've seen before include "Set of collected pieces of creative work" , "Set of investments held by one person" , "A set of investment" , "minister's office" , "Shares" .)