To and fro (4,3,5)

I think it could be either:
back and forth
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">to and fro</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Another definition for back and forth that I've seen is " To and fro".)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">to and fro</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Another definition for hither and thither that I've seen is " To and fro".)