Vessels one saves from being wrecked? (5)

I believe the answer is:

vases

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

'vessels' is the definition.
(I know this)

'one saves from being wrecked?' is the wordplay.
'saves' anagrams to 'VASES'.
But, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for vases that I've seen before include "Pots for cut flowers" , "Containers for cut flowers" , "Open jars for flowers" , "Jars for flowers (5)" , "Saves in containers for flowers" .)

I've seen this clue in the Evening Standard.

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