we did this last year - bimble with scenery
(*goes on to Kilmory, Lamlash to Whiting bay this is doable in a car)
we dropped down the distinct sandy zizzag at Glenashdale falls (worth finding the viewing platform at falls, steps with potential, and you'll see the giants graves), then Whiting Bay , R to Sandbraes (*You have to walk along the beach a little bit after the white road ends on it and find a nearly hidden stile through wood up via another couple of stiles) then out to Kings Cross point on black path (lovely views at point, ancient fort, destroyed WW2 pillbox - there were submarine nets at boths ends between Holy Isle and Arran )and a sandy U shaped cove if you want a swim).
Keep on coast till fish farm metal jetty, from there you might be able to go back along beach you can certainly walk, not sure on cycling, otherwise up (via their road) and back along 841 along top road and drop down path to Cordon (*which I did in 1963 on a tricyle and mum on a Raleigh shopper), alternatively there is a marked path at the tree line but I can't vouch for that.
Other way to Clauchlands point can go to Brodick (*apparently) we stopped just after Clauchlands, as gf is non non technical and it was singletrack.