Jeer when boozer goes to stand (7)
I believe the answer is:
barrack
'jeer' is the definition.
(I know that jeer can be written as barrack)
'boozer goes to stand' is the wordplay.
'boozer' becomes 'bar'.
'goes to' says to put letters next to each other.
'stand' becomes 'rack' (synonyms).
'bar'+'rack'='BARRACK'
'when' is the link.
(Other definitions for barrack that I've seen before include "Cheer ironically" , "Boo!" , "private accommodation" , "Shout down" , "Provide (soldiers) with accommodation" .)