Keep going southeast round the hill (5)
I believe the answer is:
store
'keep' is the definition.
(I've seen this before)
'going southeast round the hill' is the wordplay.
'going southeast' becomes 'se' ('SE' can be a synonym of 'southeast'. I am not sure about the 'going' bit.**).
'round' means one lot of letters goes inside another.
'the hill' becomes 'tor' (tor is a kind of hill).
'se' enclosing 'tor' is 'STORE'.
Can you help me to learn more?
(Other definitions for store that I've seen before include "Reserve, shop" , "Save" , "Depository for goods" , "Stock or supply, or warehouse for them" , "Large shop; keep" .)