Ring woman in Paris entertained by filth (7)
I believe the answer is:
grommet
'ring' is the definition.
(protective ring used in electronics)
'woman in paris entertained by filth' is the wordplay.
'woman in paris' becomes 'mme' (I can't explain this - if you can you should give a lot more credence to this answer).
'entertained by' means one lot of letters goes inside another (inserted letters are hosted or entertained).
'filth' becomes 'grot' (I've seen this before).
'mme' placed inside 'grot' is 'GROMMET'.
Can you help me to learn more?
(Other definitions for grommet that I've seen before include "Ring of rope or metal" , "Washer; eyelet" , "Eyelet in a sheet or panel" , "Metal ring for lining a small hole" , "Ring of rubber to line a hole and prevent chafing" .)