Cleo or Frankie (5)
I believe the answer is:
laine
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">cleo</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(English singer Cleo Laine)</span><br/ ><br/ >'<span class="explanation-format__original">frankie</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Another definition for laine that I've seen is " Dame Cleo --, jazz musician".)