Closely integrated (9)

I believe the answer is:
tightknit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">closely integrated</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tightknit that I've seen before include "Closely integrated" , "organised carefully" , "well-organised" , "Closely bound" .)