Business; amour (6)
I believe the answer is:
affair
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">business</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">amour</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for affair that I've seen before include "Concern (maybe extra-marital?)" , "Concern, matter, business" , "A matter; amorous episode" , "scandal" , "Secret romance" .)