Clyde's partner (6)
I believe the answer is:
bonnie
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">clyde's partner</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 bonnie that I've seen before include "One of two gangsters" , "The Young Pretender" , "Leader of the 1745 Jacobite uprising" , "Clyde's partner" , "attractive to northerners" .)