Be loyal to (5,2)
I believe the answer is:
stand by
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">be loyal to</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stand by that I've seen before include "Remain loyal to" , "Back-up resource" , "Act like supporters" , "One ready to step in" , "person ready to step into the breach" .)