Love affair flourishing in Paris hotel (12)
I believe the answer is:
relationship
'love affair' is the definition.
'relationship' can be an answer for 'affair' (I've seen this before). I'm not sure about the 'love' bit.
'flourishing in paris hotel' is the wordplay.
'flourishing' indicates anagramming the letters (letters grow or flourish differently).
'in'+'paris'+'hotel'='inparishotel'
'inparishotel' with letters rearranged gives 'RELATIONSHIP'.
Can you help me to learn more?
(Other definitions for relationship that I've seen before include "Emotional bond" , "Emotional association between two people" , "Family connection" , "Connection, bond" , "emotional tie-up" .)