Question ruler abroad about a row (7)
I believe the answer is:
quarrel
'row' is the definition.
('quarrel' can be a synonym of 'row')
'question ruler abroad about a' is the wordplay.
'question' becomes 'q'.
'abroad' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'ruler' is an anagram of 'urrel'.
'urrel' placed around 'a' is 'uarrel'.
'q'+'uarrel'='QUARREL'
(Other definitions for quarrel that I've seen before include "Argue toss" , "Wrangle, fall out" , "Small pane of glass" , "Heated argument or disagreement" , "Row - crossbow arrow" .)