Press on (5,5)
I believe the answer is:
forge ahead
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">press on</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for forge ahead that I've seen before include "Make rapid progress" , "Move into lead" , "Get a move on" .)