Scotsman after pubs becomes wild fellow (9)
I believe the answer is:
barbarian
'wild fellow' is the definition.
(I've seen this before)
'scotsman after pubs' is the wordplay.
'scotsman' becomes 'ian' (common Scottish name).
'after' says to put letters next to each other.
'pubs' becomes 'bar bar' (two bars).
'ian' after 'barbar' is 'BARBARIAN'.
'becomes' is the link.
(Other definitions for barbarian that I've seen before include "Uncultured, brutish" , "Savage - rugby player" , "uncouth type" , "Crude" , "Uncivilised - Goth" .)