Clear cremation vessel in tip (8)
I believe the answer is:
overturn
'tip' is the definition.
(I've seen this before)
'clear cremation vessel' is the wordplay.
'clear' becomes 'overt' (both can mean apparent or obvious).
'cremation vessel' becomes 'urn' (I've seen this in another clue).
'overt'+'urn'='OVERTURN'
'in' is the link.
(Other definitions for overturn that I've seen before include "Reverses, a decision say" , "Topple or capsize" , "Invert" , "Capsize - invalidate" , "Reverse (decision)" .)