Seepage (4)
I believe the answer is:
leak
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">seepage</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for leak that I've seen before include "Secrecy breach" , "Accidental release" , "Accidental escape of water from lake" , "Reveal (secret)" , "Intentional release of secrets" .)