Crossword Genius

Dahl character - a Salt knocked back after seeing some geese? (6)

Ross

I believe the answer is:

veruca

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

'a salt knocked back after seeing some geese?' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'dahl character' is the wordplay.
I cannot quite understand how this works, but
'character' could be 'v' and 'v' is located in the answer.
The remaining letters 'eruca' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

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