Hi, Rusty!
No, as I recall, the expression I am meaning had nothing to do with "clock/clocking" - this other discussion about asking for the time, happened on a different occasion?
I expect if I scrolled down through umpteen posts, I might find it, but I'll give memory a chance first....!
I put the question to several folk in the park...and no one told me the time!
I commented on that...can you not remember?
Oh Lordy, whatever was it?
This will drive me mad now..........
I'm not sure what you mean about a clock being called a "knock"?
I cannot find that definition in Chambers under "knock"?
or under "clock"?
I have found, though, that a clock can be a beetle!
Now did you know that?