A row about money management (5)
I believe the answer is:
admin
'management' is the definition.
(I've seen this before)
'a row about money' is the wordplay.
'row' becomes 'din' (both can mean a loud disturbance).
'about' means one lot of letters goes inside another.
'money' becomes 'm' (abbreviation in economics).
'din' going around 'm' is 'dmin'.
'a'+'dmin'='ADMIN'
(Other definitions for admin that I've seen before include "Process of running an organisation (abbr)" , "Back-office work (abbr)" , "Business organisers" , "Clerical work (abbr.)" , "Paperwork (abbr)" .)