Be concerned (4)
I believe the answer is:
care
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">be concerned</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 care that I've seen before include "Guardianship; anxiety" , "Mind" , "Serious attention and thought" , "Protective custody" , "Attention - caution U protection" .)