Tip up open vase (8)

I believe the answer is:

overturn

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'tip' is the definition.
(I've seen this before)

'up open vase' is the wordplay.
'up open' becomes 'overt' (associated in meaning. I am not sure about the 'up' bit.).
'vase' becomes 'urn' (both can mean a container).
'overt'+'urn'='OVERTURN'

Can you help me to learn more?

(Other definitions for overturn that I've seen before include "Reverse (legal ruling)" , "Empty out" , "Topple or capsize" , "Reverse or capsize" , "Upset; abolish" .)

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