Delayed drinking last of hot coffee (5)
I believe the answer is:
latte
'coffee' is the definition.
(I've seen this before)
'delayed drinking last of hot' is the wordplay.
'delayed' becomes 'late' (I've seen this before).
'drinking' indicates putting letters inside.
'last of' indicates one should take the final letters.
The final letter of 'hot' is 't'.
'late' placed around 't' is 'LATTE'.
(Other definitions for latte that I've seen before include "White coffee" , "Espresso added to frothed steamed milk" , "frothy cup" , "coffee production" , "Espresso with frothy milk" .)