In Africa, cheerful store (5)
I believe the answer is:
'store' is the definition.
(I know that cache is a type of store)
'in africa cheerful' is the wordplay.
'in' indicates the answer is hidden within the clue.
'CACHE' is hidden within 'africa cheerful'.
(Other definitions for cache that I've seen before include "Hiding place for treasure or stores" , "Reserve" , "Hiding-place for treasure etc" , "Hiding place for treasure etc" , "Secret store, hoard" .)