Formal bid or offer (6)
I believe the answer is:
tender
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">formal bid</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">offer</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(tender can mean to offer something)</span><br/ ><br/ ></span>
(Other definitions for tender that I've seen before include "Delicate sort of bid" , "easily crushed" , "Former railway vehicle is sensitive" , "Supply ship" , "Offer as payment; boat" .)