Everyman, note, tucked into very old booze (4)
I believe the answer is:
vino
'booze' is the definition.
'everyman note tucked into very old' is the wordplay.
'everyman' becomes 'i' (where the crossword setter is 'Everyman').
'note' becomes 'n' (abbreviation).
'tucked into' is an insertion indicator.
'very' becomes 'v' (abbreviation).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'i'+'n'='in'
'v'+'o'='vo'
'in' inserted into 'vo' is 'VINO'.
(Other definitions for vino that I've seen before include "Italian wine - any brand" , "Wine, colloquially" , "In - veritas means alcohol promotes truth-telling" , "Wine (slang)" , "Cheap wine" .)