Northerner caught drunk outside (4)
I believe the answer is:
scot
'northerner' is the definition.
(someone from Scotland)
'caught drunk outside' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'drunk' becomes 'sot' (both can mean someone who drinks too much).
'outside' indicates putting letters inside.
'c' inserted into 'sot' is 'SCOT'.
(Other definitions for scot that I've seen before include "Tax, Glasgow native" , "---- free: originally free from penalties of taxation" , "levy, once" , "Glaswegian, say" , "Northern member of UK" .)