Stash or conceal (7)
I believe the answer is:
secrete
This clue is a double definition.
'stash' is the first definition.
(thesaurus)
'conceal' is the second definition.
(I know that secrete is a type of conceal)
(Other definitions for secrete that I've seen before include "Hide - discharge" , "Hide or conceal an object" , "Form substance for use within body, as liver does bile" , "Release bodily fluid" , "harbour" .)