Reasons for and against (4,3,4)
I believe the answer is:
pros and cons
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reasons for and against</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pros and cons that I've seen before include "Arguments for and against" , "Reasons for and against" , "Groups of dubious characters" , "Advantages compared to disadvantages" .)