Crossword Genius

Run fluids into vessel (urn safest perhaps) (9)

Ross

I believe the answer is:

transfuse

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'run fluids into vessel' is the definition.
I can't judge whether this defines the answer.

'urn safest perhaps' is the wordplay.
'perhaps' indicates an anagram.
'urn'+'safest'='urnsafest'
'urnsafest' with letters rearranged gives 'TRANSFUSE'.

Can you help me to learn more?

(Other definitions for transfuse that I've seen before include "Spread throughout" , "Safest run (anag.)" .)

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