P look-alike (3)
I believe the answer is:
rho
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">p look-alike</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 rho that I've seen before include "Something like 25 [ETA]" , "Sophocles character" , "letter to Athens" , "Greek character" , "Seventeenth letter of the Greek alphabet" .)