The new men do barge right in (6)
I believe the answer is:
'the new' is the definition.
(I've seen this before)
'men do barge right in' is the wordplay.
'men' becomes 'm' (abbreviation).
'do barge' becomes 'oder' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'right' says to take the final letters (I've seen 'right of' mean this (letter on the rightmost end of the word)).
The final letter of 'in' is 'n'.
'm'+'oder'+'n'='MODERN'
Can you help me to learn more?
(Other definitions for modern that I've seen before include "The very latest available" , "See 11" , "'Contemporary, up-to-the-minute (6)'" , "Belonging to the present or recent times" , "Belonging to the present time" .)