Six numbers, which can be repeated, are selected from the set $\{0,..,9\}$, and form a sequence: $<{*}{*}{*}{*}{*}{*}>$.
Each verse in the themed poem corresponds to a number. Can you find the numbers? $$$$ "Tick tock went the clock, her spell was as heavy as a cinder block."
"Shrinking in a brown house, then she finds a swimming little mouse."
"This is easier than before, and one could say they were four."
"Three times in the name it appears, and this has nothing to do with my ears."
"If you found the previous, then this should be tedious.
Similar name and figure here, and the animal's clock is what you want to hear."
"The ending is enjoyable, though the intentions were horrible.
All you need is in the name, this is yet another word game.
Always be suspicious, about the truthfulness of the nutritious.
Beware of Greeks bearing gifts, though she was trapped on the cliffs.
The grapefruit was poisonous, not venomous like a snake.
Now love took its place, and before she knew, she was awake."
EDIT 1:
Every verse is themed distinctively. The general theme, however, is fantasy.
EDIT 2: Partial Answer. WARNING, SPOILER
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