Drink from tube, Eric (4)
I believe the answer is:
beer
'drink' is the definition.
(beer is a kind of drink)
'from tube eric' is the wordplay.
'from' indicates the answer is hidden within the clue.
'BEER' can be found hidden inside 'tube eric'.
(Other definitions for beer that I've seen before include "Hop drink" , "It may be 13 across-ed!" , "Drink using hops, malt, etc" , "eg Bitter" , "... this at pub?" .)