Espy casks, tumbled in paintings (9)

I believe the answer is:

skyscapes

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'paintings' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'espy casks tumbled' is the wordplay.
'tumbled' indicates an anagram (I've seen 'tumble' mean this).
'espy'+'casks'='espycasks'
'espycasks' anagrammed gives 'SKYSCAPES'.

'in' acts as a link.

Can you help me to learn more?

I've seen this clue in The Mirror.

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