Lust of a person with passion (6)

I believe the answer is:

desire

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

'a person with passion' is the wordplay.
'a person with' becomes 'des' (I am not sure about this - if you are sure you should believe this answer much more).
'passion' becomes 'ire' (ire is passionate anger).
'des'+'ire'='DESIRE'

'of' is the link.

Can you help me to learn more?

(Other definitions for desire that I've seen before include "Strong wish" , "Reside (anag.)" , "Want strongly" , "Want to reside?" , "Longing or wish" .)

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