After pubs Scotsman becomes wild fellow (9)
I believe the answer is:
barbarian
'wild fellow' is the definition.
(I've seen this before)
'after pubs scotsman' is the wordplay.
'after' is a charade indicator (letters next to each other).
'pubs' becomes 'bar bar' (two bars).
'scotsman' becomes 'ian' (common Scottish name).
'barbar' put next to 'ian' is 'BARBARIAN'.
'becomes' is the link.
(Other definitions for barbarian that I've seen before include "wild fellow" , "Brutish type" , "An uncivilised, rough person" , "uncivilised man" , "Savage - rugby player" .)