What's on this, may make you goggle! (3,3)
I believe the answer is:
the box
'what's on this may make you goggle' is the definition.
The answer and definition can be both plants as well as being singular nouns.
Maybe you can see an association between them that I don't see?
This is the entire clue.
Can you help me to learn more?
(Another definition for the box that I've seen is " TV (sl.)".)
Want a hint initially instead of a full solution?
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