Late drink that goes to your head? (8)
I believe the answer is:
nightcap
'late drink that goes to your head?' is the definition.
'nightcap' can be an answer for 'late drink' (drink drunk late at night). I'm not certain of the rest of the definition.
'late drink that goes to your head?' is the wordplay.
I cannot quite understand how this works, but
'late' could be 'night' (I've seen this before) and 'night' is found within the answer.
'head?' could be 'cap' (both can mean the top of something) and 'cap' is found within the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for nightcap that I've seen before include "Head covering" , "Alcoholic drink taken at bedtime" , "A drink before sleep" , "Patching (anag.)" , "Take before bed or wear in bed" .)