Flower father keeps out back, one ending in soil (8)

I believe the answer is:

daffodil

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'flower' is the definition.
(I've seen this before)

'father keeps out back one ending in soil' is the wordplay.
'father' becomes 'dad' (informal term for father).
'keeps' indicates putting letters inside.
'out back' becomes 'ffo' (I can't explain this - if you can you should give a lot more credence to this answer).
'one' becomes 'i' (Roman numeral).
'ending in' says to take the final letters.
The final letter of 'soil' is 'l'.
'dad' placed around 'ffo' is 'daffod'.
'daffod'+'i'+'l'='DAFFODIL'

Can you help me to learn more?

(Other definitions for daffodil that I've seen before include "Bloomer" , "Yellow spring flower beloved of Wordsworth" , "National flower of Wales" , "Yellow flower with trumpet-shaped centre" , "Floral emblem of Wales" .)

I've seen this clue in The Telegraph.

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