Out of interest, what is the exact problem/symptoms?
If it's noisy then OK, but if it's simply not working it's just as likely to be the electrical relay.
I'm not sure of the one used on the Jazz, but I know on other cars/compressors the clutch/pulley assembly is a unit which is threaded onto the compressor shaft, in which case you need to double check which direction it rotates to decide whether it will be left or right hand thread. I'm not sure how the compressor shafts are held in order to remove them, an impact wrench can sometimes do the job without having to hold the compressor (the inertia will be enough). There might be a hex socket in the end of the shaft.
If wanting to replace the clutch it's probably as easy to replace the whole compressor/clutch assembly since it'll almost certainly be necessary to remove it from the car so will need de-gassing and refilling afterwards anyway.
Not much help I'm afraid, but might be a slightly useful hint here and there.