Drunken peril holding tin: it's lager! (7)
I believe the answer is:
pilsner
'lager' is the definition.
(type of lager)
'drunken peril holding tin' is the wordplay.
'drunken' is an anagram indicator.
'holding' means one lot of letters goes inside another.
'tin' becomes 'Sn' (Sn is the chemical symbol for tin).
'peril' with letters rearranged gives 'piler'.
'piler' enclosing 'sn' is 'PILSNER'.
'it's' is the link.
(Other definitions for pilsner that I've seen before include "drink" , "Bar tab might include this" , "Type of lager" , "alcohol" , "Czech beer" .)