Green’s Dictionary of Slang

clout n.⁵

a stupid, oafish person.

1714		J. Gay Shepherd’s Week 1st Pastoral 4: Hold, witless Lobbin Clout.
1788		Morris et al. ‘Denis O’Neal’ in The Festival of Anacreon (1810) 76: But you won’t make a Judy of Denis O’Neal. / With your jumping, jungling, grinning, mouthing, / Clout-headed, thick-headed, brazon-nos’d, copper-fac’d, / Ill looking thief!
1937		D. Fuchs Low Company 194: He wouldn’t give these ignorant clouts the satisfaction.

In phrases

clout-faced (adj.)

stupid-looking.

1833

Satirist (London) 17 Feb. 475/3: ‘Higgins, you clout-faced loon,’ bellowed Gloucester, ‘answer me this’.