It’s huge climb, in Paris it’s good to be a monkey (6)
I believe the answer is:
gibbon
'monkey' is the definition.
(I've seen this before)
'it's huge climb in paris' is the wordplay.
'it's huge' becomes 'big' (similar in meaning).
'climb' says the letters should be written backwards (I've seen 'climbs' mean this).
'in paris' becomes 'bon' (I am not sure about this - if you are sure you should believe this answer much more).
'big' written backwards gives 'gib'.
'gib'+'bon'='GIBBON'
'it's good to be a' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for gibbon that I've seen before include "Long-armed ape" , "MONKEY" , "Writer" , "Animal" , "Small ape - famous historian" .)