Argument among lawyers? One's pushed in the street (6)
I believe the answer is:
barrow
'argument among lawyers?' is the definition.
I can't tell whether this definition defines the answer.
'one's pushed in the street' is the wordplay.
'one' becomes 'a' (a thing is one thing).
'pushed' becomes 'br' (I can't explain this - if you can you should give a lot more credence to this answer).
'in' means one lot of letters goes inside another.
'the street' becomes 'row' (eg Savile Row).
'a' going into 'br' is 'bar'.
'bar'+'row'='BARROW'
Can you help me to learn more?
(Other definitions for barrow that I've seen before include "Handcart; burial mound" , "old burial ground" , "Cart; tumulus" , "Ancient burial mound" , "Cart for the river?" .)