No apology

by Roland Foster

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A.   Make impervious to household pests (2 wds)

B.   Not yet visible (3 wds)

C.   Undesirables

D.   Twin from Wonderland

E.   Phony

F.   Famous 1817 hybrid rose

G.   Old English gunpowder factory site

H.   Not ordinarily visible (3 wds)

I.   Common hobby construction materials

J.   Overly elevated (4 wds)

K.   Labors

L.   Ability to make do

M.   Remedy for Grave`s Disease

N.   Foot-and-mouth disease, esp. in Latin America

O.   Not intentionally visible (3 wds)

P.   Anyhow (dial.)

Q.   Flow out or pour out

R.   Having very light colored hair

S.   Military wives group (initials)

T.   Bottom

U.   Rapidly changing