Went back to be in Paris, having graded accommodation (9)
I believe the answer is:
retreated
'went back' is the definition.
('retreat' can be a synonym of 'go back')
'be in paris having graded accommodation' is the wordplay.
I cannot quite understand how this works, but
'be in paris' could be 'etre' (I've seen this in another clue) and 'etre' is found in the answer.
'graded' could be 'rated' ('rate' can be a synonym of 'grade') and 'rated' is located in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
'to' acts as a link.
Can you help me to learn more?
(Other definitions for retreated that I've seen before include "Withdrew from enemy forces" , "Gave up ground" , "Retired" , "given extra medical care?" , "pulled back" .)