Loopy game may see card-castle collapsing! (4-6)

I believe the answer is:

cat's cradle

I'm a little stuck... Click here to teach me more about this clue!

'loopy game' is the definition.
'cat's cradle' can be an answer for 'game' (child's game). I'm unsure of the 'loopy' bit.

'card-castle collapsing' is the wordplay.
'collapsing' is an anagram indicator.
'card'+'castle'='cardcastle'
'cardcastle' is an anagram of 'CATS-CRADLE'.

'may see' acts as a link.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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