Run into revolting boozer and belch (4)
I believe the answer is:
burp
'belch' is the definition.
('burp' can be a synonym of 'belch')
'run into revolting boozer' is the wordplay.
'run' becomes 'r' (cricket abbreviation).
'into' is an insertion indicator.
'revolting' is a reversal indicator.
'boozer' becomes 'pub' (UK slang**).
'pub' written backwards gives 'bup'.
'r' inserted inside 'bup' is 'BURP'.
'and' is the link.
(Other definitions for burp that I've seen before include "Eructate" , "Belch like baby" , "Indian drum" , "Bring up wind" , "Rift" .)