Fur-trading tycoon (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fur-trading tycoon</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for astor that I've seen before include "female parliamentarian" , "First female MP" , "Nancy ---, first woman MP" , "See 2" , "Nancy --, one-time MP" .)