Kept going; supported (9)
I believe the answer is:
sustained
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">kept going</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">supported</span>' is the second definition.<br/ ><span class="explanation-format__explanation">('sustain' can be a synonym of 'support')</span><br/ ><br/ ></span>
(Other definitions for sustained that I've seen before include "held up" , "Steadily maintained" , "Kept going, supported" , "prolonged" , "Kept (something) going" .)