Closely acquainted (8)
I believe the answer is:
intimate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">closely acquainted</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 intimate that I've seen before include "Close acquaintance" , "Private and personal like close acquaintanceship" , "pal" , "Friendly" , "Tip off" .)