Untainted Northern railwaymen recalled second (6-2)
I believe the answer is:
runner-up
'second' is the definition.
(I've seen this before)
'untainted northern railwaymen recalled' is the subsidiary indication.
'untainted' becomes 'pure' (I've seen this before).
'northern' becomes 'n' (abbreviation e.g. N. Ireland).
'railwaymen' becomes 'nur' (I've seen this in other clues).
'recalled' shows that the letters should be reversed in order.
'pure'+'n'+'nur'='purennur'
'purennur' in reverse letter order is 'runnerup'.
(Other definitions for runner-up that I've seen before include "Second-place" , "Second best?" , "Silver medal winner" , "One who is second in a race" , "Second-placed contestant" .)