Lastly (7)
I believe the answer is:
finally
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lastly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for finally that I've seen before include "At last" , "for ever" , "when all is said and done" .)