Coffee type (5)
'coffee type' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for espresso that I've seen before include "strong drink" , "It's made by forcing steam through ground coffee beans" , "Coffee-making machine" , "Coffee (S, not X)" , "Strong black coffee" .)
(Other definitions for latte that I've seen before include "Coffee served with hot milk" , "Kind of espresso coffee" , "Espresso with frothy milk" , "Style of coffee" , "See 21" .)