Today's puzzle sought to be more difficult than clever, and in that it succeeded; I prefer the latter. There were, however, two good ones:"Sign of possession"
may suggest omen
As far as I know, which may not be too far, oeno-
means wine, not cellar. John sought to make the clue more difficult by using "cellar" to mean "wine cellar," and since wine is stored in cellars, oeno-
is in fact a "Cellar prefix." By that logic, though, TELE could be "Room prefix" since televisions are placed in TV rooms. Possible, I guess.