Rhombus (7)
I believe the answer is:
lozenge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rhombus</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that rhombus can be written as lozenge)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for lozenge that I've seen before include "Medicinal sweet" , "Rhombus; tablet" , "Medicinal tablet" , "Diamond shape; throat sweet" , "Diamond-shaped sweet" .)