Container of beer, note, in various tins (5)
I believe the answer is:
stein
'container of beer' is the definition.
'stein' can be an answer for 'container' (stein is a kind of container). I am not certain of the 'of beer' bit.
'note in various tins' is the wordplay.
'note' becomes 'e' (musical note).
'in' means one lot of letters goes inside another.
'various' indicates an anagram.
'tins' anagrammed gives 'stin'.
'e' inserted into 'stin' is 'STEIN'.
Can you help me to learn more?
(Other definitions for stein that I've seen before include "Inset (anag.)" , "Beer-mug" , "Gertrude __, avant-garde US author, d. 1946" , "German tankard" , "Large earthenware beer mug" .)