Keep to the right in the southeast (5)
I believe the answer is:
store
'keep' is the definition.
(I know that keep is a more specific form of store)
'to the right in the southeast' is the wordplay.
'the right' becomes 'r' (common abbreviation).
'in the' means one lot of letters goes inside another.
'southeast' becomes 'SE' (synonyms).
'to'+'r'='tor'
'tor' placed inside 'se' is 'STORE'.
(Other definitions for store that I've seen before include "Large shop; computer memory" , "Put by; shop" , "Put away for future use" , "Shop; hoard" , "Supermarket" .)