Change form (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">change form</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 mutate that I've seen before include "Undergo cellular change" , "Me taut? (anag) - change fundamentally" , "Undergo alteration in form" , "Gradually change form" , "Alter genetically" .)
(Other definitions for coin that I've seen before include "Think up" , "Mint" , "Metal currency" , "Invent (a new phrase)" , "Metallic money" .)