Clavicle Error - Broken Collarbone

except arm movement is very painful with a sensation like bone rubbing/clicking.
Bone crepitus. It's the fracture ends moving against each other. It's a bit grim.

I'm assuming you have been told already, but you want to avoid lifting your arm above shoulder height like the plague.

TM re-fractured his plated clavicle by lifting a remote control.

my recovery/recovery time and the way forward than I was before posting :(

I guess I just have to resign myself that riding might be as good one day, but upper body strength might not be for a longer time or maybe ever?
Depending on your age. In 3 months, it's a good bet that you will have a pretty good range of movement (assuming you get it plated), but full strength could be from 6 months to 12 months.

I was swimming and doing deadlifts after 3 months (with my Orthopod's blessing), but it took a further 3 months until I was back at the same level.

Having the plate removed is an in-and-out job by the way, and recovery is however long it takes the operation wound to heal. Even the nerve damage is transitory.