Labour flagging striking victory (4)
I believe the answer is:
slog
'labour flagging striking victory' is the definition.
'slog' can be an answer for 'labour' (labour can mean to work or slog). I am not certain of the 'flagging striking victory' bit.
'labour' is the wordplay.
I cannot quite understand how this works, but
'labour' could be 'l' (political abbreviation) and 'l' is present in the answer.
The remaining letters 'sog' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for slog that I've seen before include "Work doggedly" , "Hit hard - hard trek" , "Wild cricket hit" , "Very tiring work" , "Walk hard carrying logs?" .)