Before long (4)
I believe the answer is:
soon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">before long</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for soon that I've seen before include "Shortly" , "Before long" , "Presently" , "Willingly" , "In the near future" .)