Fail to look after (7)
I believe the answer is:
neglect
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fail to look after</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for neglect that I've seen before include "Give little attention to" , "slight" , "Not caring" , "Treat carelessly" , "Failure to show care" .)