0 a short sharp noise made by two hard objects being hit together:
1 If two hard objects clack, they make a short sharp noise because they hit together:
A typewriter was clacking in the next room.
2 a short sound made when two hard objects hit
She heard his footsteps clacking along the concrete pavement.
The knocker on her door clacked noisily as she slammed it closed.
Clack wants to resist this kind of expressivism.
Clack sees this as an attempt to protect religion from criticism : that which is criticizable is not religion, it is superstition.
Clack discusses this latter expressivism later, but first we need to comment on his cathartic thesis.
Clack is at a loss to know how anything else can be involved.
Clack is more explicit than most, however, in offering us a detailed account of how this misleading conclusion is arrived at.