Sails support (4)
(Other definitions for mast that I've seen before include "Acorns, etc., fed to pigs" , "nuts and seeds" , "Television transmitter" , "Pole on ship" , "Spar to support a sail" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sail's support</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 spar that I've seen before include "Translucent mineral" , "dispute" , "quarrel" , "microcrystalline mineral?" , "Act as boxer" .)