Strong will? (5)
I believe the answer is:
shall
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">strong will?</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 shall that I've seen before include "' - - We Dance?'" , "Will, must, is to" .)