Desire freedom associated with marital consent? (6)

I believe the answer is:

libido

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'desire' is the definition.
(I know that libido is a type of concupiscence)

'freedom associated with marital consent?' is the wordplay.
'freedom' becomes 'lib' (I can't justify this - if you can you should believe this answer much more).
'associated with' is a charade indicator (letters next to each other).
'marital consent?' becomes 'ido' ('I do' - consent to marriage vows).
'lib'+'ido'='LIBIDO'

Can you help me to learn more?

(Other definitions for libido that I've seen before include "Instinctive desire" , "Freud's sex drive" , "Strong urge" , "Sexual impulse" , "lust!" .)

I've seen this clue in The Sun.

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