H, to Homer (3)
I believe the answer is:
eta
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">h to homer</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 eta that I've seen before include "Seventh Greek letter" , "Greek letter - Basque nationalist movement" , "When one is due" , "Militants" , "European separatists, initially" .)