TV villain's extremely drunk, drinking beer (5)
I believe the answer is:
dalek
'tv villain's' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'extremely drunk drinking beer' is the wordplay.
'extremely' suggests removing the centre (only the extremes of the word are used).
'drinking' is an insertion indicator (inserted letters are consumed or drunk).
'beer' becomes 'ale' (type of beer).
'drunk' with its centre removed is 'dk'.
'dk' going around 'ale' is 'DALEK'.
Can you help me to learn more?
(Other definitions for dalek that I've seen before include "Alien creature" , "SF villain" , "Doctor Who enemy" , "Doctor Who creature" , "Dr Who enemy" .)