Bizarrely attractive, Frankfort's heart -- here! (5)

I believe the answer is:

kinky

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'bizarrely attractive' is the definition.
I can't tell whether this defines the answer.

'frankfort's heart here' is the wordplay.
'heart' says to take the centre.
'here' becomes 'inky' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The middle letter of 'frankfort' is 'k'.
'k'+'inky'='KINKY'

Can you help me to learn more?

(Other definitions for kinky that I've seen before include "Given to deviant sexual practices" , "Deviant, eccentric" , "Given to unusual sexual behaviour" , "Sexually unusual" , "Irritatingly self-satisfied" .)

I've seen this clue in The Telegraph.

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