On strike about railway, getting public disapproval (6)
I believe the answer is:
outcry
'public disapproval' is the definition.
(I've seen this before)
'on strike about railway getting' is the wordplay.
'on strike' becomes 'out' (I've seen this before).
'about' becomes 'c' (abbreviation for 'circa'**).
'railway' becomes 'ry' (abbreviation for railway).
'getting' means one lot of letters go next to another.
'out'+'c'+'ry'='OUTCRY'
(Other definitions for outcry that I've seen before include "Exclamation, shout" , "Widespread protest - clamour" , "Public uproar" , "Great fuss" , "Exclamation - clamour" .)