Keep tabs on (7)
I believe the answer is:
monitor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">keep tabs on</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for monitor that I've seen before include "Check on - large lizard" , "Keep a check on" , "Person or device for observing and checking" , "Display device" , "one checks continuously" .)