Just like in outskirts of Paris, while away (4)
I believe the answer is:
pass
'while away' is the definition.
(pass time)
'just like in outskirts of paris' is the wordplay.
'just like' becomes 'as' (I am not sure about the 'just' bit.).
'in' means one lot of letters goes inside another.
'outskirts of paris' becomes 'PS' (first and last letters of 'Paris').
'as' placed within 'ps' is 'PASS'.
Can you help me to learn more?
(Other definitions for pass that I've seen before include "Don't answer a question" , "sticky situation if one is pretty" , "Get beyond" , "Exam success" , "Narrow route through high mountain, like the Khyber" .)