Source of stability (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">source of stability</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 anchor that I've seen before include "Last runner in relay race team" , "Ship's fluke" , "Fix firmly and stably" , "Charon (anag.); Styx ferryman" , "Ship's holding device" .)
(Other definitions for ballast that I've seen before include "Material for railway bed" , "Heavy material giving ship stability" , "Material used to stabilize a ship" , "Stabilising weight (naut.)" , "Stabilising material" .)