Seen Cave tragically fade from memory (8)

I believe the answer is:

evanesce

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'fade from memory' is the definition.
'evanesce' can be an answer for 'fade' (thesaurus). I am unsure of the 'from memory' bit.

'seen cave tragically' is the wordplay.
'tragically' indicates an anagram (I've seen this in other clues).
'seen'+'cave'='seencave'
'seencave' is an anagram of 'EVANESCE'.

Can you help me to learn more?

(Other definitions for evanesce that I've seen before include "Seen cave (anag) -- disappear gradually" , "Shimmering" , "Fade quickly from sight" , "Fade away" .)

I've seen this clue in The Independent.

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