Opposite of absorb (4)
I believe the answer is:
emit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">opposite of absorb</span>' is the definition.<br/ ><span class="explanation-format__explanation">('emit' is the opposite to 'absorb')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for emit that I've seen before include "Sent" , "Expel" , "Exude" , "Conductor; telegram (US)" , "Release" .)