Chaps who should know what's in store (12)

'chaps who should know what's in store' is the definition.
The definition and answer are not the same part of speech.

'chaps who should know what's in store' is the wordplay.
I cannot really see how this works, but
'chaps' could be 'men' (I've seen this before) and 'men' is found within the answer.
'store' could be 'warehouse' (warehouse is a kind of store) and 'warehouse' is located in the answer.
No letters remain.
This may be the basis of clue (or it may be nonsense).