Strong and sturdy (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">strong and sturdy</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for robust that I've seen before include "Down-to-earth" , "Physically strong" , "Sturdily built" , "Unlikely to break" , "Well-built" .)
(Other definitions for solid that I've seen before include "Dense" , "continuous" , "cone-shaped, say" , "Firm and stable" , "Weighty" .)