Charges hidden by Cafe Espresso (4)
I believe the answer is:
fees
'charges' is the definition.
(fee is a kind of charge)
'hidden by cafe espresso' is the wordplay.
'hidden' says the answer is hidden in the clue.
'FEES' is hidden within 'by cafe espresso'.
(Other definitions for fees that I've seen before include "pay" , "Emoluments" , "Lawyers' charges" , "Professional payments" , "Charges, payments" .)