Where there's an awful lot of coffee in Brazil (6)

'coffee in brazil' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'where there's an awful lot of' is the wordplay.
I cannot really see how this works, but
'there's' could be 'n' (I've seen this in other clues) and 'n' is located in the answer.
'an' could be 'a' and 'a' is found within the answer.
'of' could be 'o' and 'o' is found in the answer.
The remaining letters 'sts' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?