What the following numbers show (4,6)
'what the following numbers' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'show' is the wordplay.
I cannot quite see how this works, but
'show' could be 'word' (wording is a kind of showing) and 'word' is found in the answer.
The remaining letters 'length' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
But I've got no explanation for this one! Could you help me understand?