Hard time recalling forename of WWI heroine (5)

I believe the answer is:

edith

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'forename of wwi heroine' is the definition.
I can't judge whether this defines the answer.

'hard time recalling' is the wordplay.
'hard' becomes 'h' (abbreviation used in pencil classifications).
'time' becomes 'tide' (suffix meaning time eg Yuletide).
'recalling' says the letters should be written backwards.
'h'+'tide'='htide'
'htide' back-to-front is 'EDITH'.

Can you help me to learn more?

(Other definitions for edith that I've seen before include "Osbert's sister" , "- Cavell, WW 1 heroine" , "Dame - Sitwell, English poet (Facade)" , "and 19 Across: 'Little Sparrow'" , "girl" .)

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