Something resembling a pepper pot that contains beer (5)
I believe the answer is:
dalek
'something' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'a pepper pot that contains beer' is the wordplay.
'a pepper pot' becomes 'dk' (I can't explain this - if you can you should believe this answer much more).
'that contains' means one lot of letters goes inside another.
'beer' becomes 'ale' (type of beer).
'dk' enclosing 'ale' is 'DALEK'.
'resembling' acts as a link.
Can you help me to learn more?
(Other definitions for dalek that I've seen before include "Dr Who enemy" , "Alien creation" , "Doctor Who enemy" , "Dr Who's alien robot" , "trouble for the doctor?" .)