Intend storing heroin in craft for now (9)
I believe the answer is:
meanwhile
'for now' is the definition.
(I've seen this before)
'intend storing heroin in craft' is the wordplay.
'intend storing' becomes 'mean' (I can't justify this - if you can you should give a lot more credence to this answer).
'heroin' becomes 'h' ('H' can be a synonym of 'heroin').
'in' indicates putting letters inside.
'craft' becomes 'wile'.
'h' placed into 'wile' is 'while'.
'mean'+'while'='MEANWHILE'
(Other definitions for meanwhile that I've seen before include "In the intervening time" , "in intervening period" , "In the interim" , "simultaneously" , "For the moment" .)