Selfish person? More difficult to keep nothing (7)
I believe the answer is:
hoarder
'selfish person?' is the definition.
'hoarder' can be an answer for 'person?' (hoarder is a kind of person). I am not sure about the 'selfish' bit.
'more difficult to keep nothing' is the wordplay.
'more difficult' becomes 'harder' ('hard' is associated in meaning with 'difficult').
'to keep' indicates putting letters inside.
'nothing' becomes 'o' (looks like zero - 0).
'harder' going around 'o' is 'HOARDER'.
Can you help me to learn more?
(Other definitions for hoarder that I've seen before include "Person gathering and storing objects" , "One who accumulates or stockpiles" , "Accumulator" , "18 [MAGPIE] , perhaps" , "Person unlikely to throw things away" .)