Spiritual advice to Moses in warehouse (6)
'warehouse' is the definition.
(godown is a kind of warehouse)
I don't understand the remainder of the clue.
(Other definitions for godown that I've seen before include "Leave university" , "storage facility in India" , "eastern warehouse" .)
'spiritual' is the definition.
(similar in meaning)
'in warehouse' is the wordplay.
'warehouse' becomes 'ward' (I can't explain this - if you can you should believe this answer much more).
'in'+'ward'='INWARD'
'advice to moses' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
(Other definitions for inward that I've seen before include "Situated on the inside" , "In the mind or spirit, not outside" , "Formerly private" , "Existing in the mind - to the centre" , "Towards the centre" .)