Bit of condensation (4)
I believe the answer is:
bead
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bit of condensation</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 bead that I've seen before include "Round piece of glass, etc" , "Small round piece of glass" , "Drop of liquid on a surface" , "Necklace piece; droplet" , "Small ball with a hole through the middle" .)