Ice creams in Rome? We in Paris like jelly (10)

I believe the answer is:
gelatinous
'like jelly' is the definition.
(I've seen this in another clue)
'ice creams in rome? we in paris' is the wordplay.
I cannot quite understand how this works, but
'in' is present in the answer.
'we' could be 'us' and 'us' is located in the answer.
The remaining letters 'gelato' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for gelatinous that I've seen before include "description of size" , "Of a jelly-like consistency" .)
