Honeycomb compartment (4)
I believe the answer is:
cell
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">honeycomb compartment</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cell that I've seen before include "Place for a prisoner" , "Monastic room" , "Prisoner's accommodation" , "required for current generation?" , "Biological unit with a nucleus" .)