The Collaborative International Dictionary
Clearstarch
Clearstarch \Clear"starch`\ (kl[=e]r"st[aum]rcht`), v. t. [imp. & p. p. Clearstarched; p. pr. & vb. n. Clearstraching.] To stiffen with starch, and then make clear by clapping with the hands; as, to clearstarch muslin.
Wiktionary
clearstarch
vb. (context transitive English) To stiffen with starch, and then make clear by clapping with the hands.