Show with questions flower maiden keeps in memory (10)

I believe the answer is:

mastermind

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'show with questions flower maiden' is the definition.
I can't judge whether this definition defines the answer.

'keeps in memory' is the wordplay.
'keeps in' becomes 'master' (I am not sure about this - if you are sure you should believe this answer much more).
'memory' becomes 'mind' (mind is a kind of memory).
'master'+'mind'='MASTERMIND'

Can you help me to learn more?

(Other definitions for mastermind that I've seen before include "Ringleader" , "Planning supremo" , "Intellectual" , "Criminal planner" , "Criminal genius" .)

I've seen this clue in The Independent.

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