Strength of character (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">strength of character</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 mettle that I've seen before include "Spirit could sound like iron, say" , "'Nerve, heart, courage (6)'" , "Strength of character, courage" , "The courage to carry on" , "Courage sounds like iron, for instance" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">strength of character</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for fibre that I've seen before include "Thread; stamina" , "Dietary material; thread" , "Threadlike substance" , "Texture - strength of character" , "Long fine thread" .)