Storing remains covered by incense (8)
I believe the answer is:
stashing
'storing' is the definition.
'remains covered by incense' is the wordplay.
'remains' becomes 'ash' (I've seen this before).
'covered by' indicates putting letters inside.
'incense' becomes 'sting' (both can mean to anger).
'ash' inserted into 'sting' is 'STASHING'.
(Other definitions for stashing that I've seen before include "Storing in a secret place" , "Stowing away" , "stocking, secretly" .)