Uncover smooth type of coffee (5)
I believe the answer is:
latte
'type of coffee' is the definition.
(I've seen this before)
'uncover smooth' is the wordplay.
'uncover' indicates the central letters (I've seen 'uncovered' mean this).
'smooth' becomes 'flatten' (I've seen this before).
The centre of 'flatten' is 'LATTE'.
(Other definitions for latte that I've seen before include "Coffee beverage" , "Espresso coffee and milk" , "Milky coffee drink" , "Coffee served with hot milk" , "Kind of espresso coffee" .)