Imaginary being (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">imaginary being</span>' is the definition.<br/ ><span class="explanation-format__explanation">(mermaid is a kind of imaginary being)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for mermaid that I've seen before include "siren" , "London theatre?" , "Fabulous female" , "Woman-fish" , "Mythical swimmer" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">imaginary being</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 elf that I've seen before include "He causes mischief" , "tiny little chap" , "Woodland fairy" , "Supernatural creature of folk tales" , "Diminutive folklore creature" .)