Aim to be in Paris, beginning to experience some urban life? (5,4)
I believe the answer is:
plane tree
'some urban life?' is the definition.
(planes are often grown in UK cities)
'aim to be in paris beginning to experience' is the wordplay.
'aim' becomes 'plan' (I've seen this before).
'to be in paris' becomes 'etre' (French verb 'to be').
'beginning to' suggests taking the first letters.
The first letter of 'experience' is 'e'.
'plan'+'etre'+'e'='PLANE-TREE'
(Other definitions for plane tree that I've seen before include "maple" , "It sheds its bark" , "growth" , "Common city plant" .)