Lets in (6)
I believe the answer is:
admits
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lets in</span>' is the definition.<br/ ><span class="explanation-format__explanation">('admit' can be a synonym of 'let in')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for admits that I've seen before include "Owns up or lets in" , "Takes in" , "Lets in and confesses" , "Does not deny" , "Agrees to the truth of something" .)