Lady of the Lake? (10)
'lady of the lake?' is the definition.
'windermere' can be an answer for 'lake?' (I've seen this before). I am not certain of the 'lady of the' bit.
'of the lake?' is the wordplay.
'of' becomes 'winder' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'the lake?' becomes 'mere' (mere is a kind of lake).
Can you help me to learn more?
(Other definitions for windermere that I've seen before include "Lake District lake" , "Water body" , "inland water" , "Cumbrian lake" .)
But I've got no explanation for this one! Could you help me understand?
(Other definitions for constance that I've seen before include "gave delight to Mellors" , "European lake" , "Lady Chatterley, say" , "Lady Chatterley, for example" , "Lake through which Rhine flows" .)