Tied up in Paris and owing money? (8)
I believe the answer is:
tethered
'tied' is the definition.
(thesaurus)
'up in paris and owing money?' is the wordplay.
'up' says the letters should be written backwards (in down clue: letters go upwards).
'in paris and' becomes 'et' ('and' in French).
'owing money?' becomes 'thered' (I can't explain this - if you can you should give a lot more credence to this answer).
'et' in reverse letter order is 'te'.
'te'+'thered'='TETHERED'
Can you help me to learn more?
(Other definitions for tethered that I've seen before include "Restrained with a rope" , "Tied (animals) up" , "on a leash" , "Of animal, with rope fastened to prevent straying" , "Bound" .)